Category: Audio Accessories

Bluetooth Fast Pairing–to be part of the Android platform

Articles

Android main interactive lock screen

Most recent Android smartphones may be able to support one-touch pair-up for Bluetooth accessories

Android ‘Fast Pair’ will quickly connect Bluetooth devices | Engadget

Announcing Fast Pair – effortless Bluetooth pairing for Android | Android Developers Blog

My Comments

Google has answered the setup method that Apple has implemented for their AirPod wireless in-ear headset by implementing a software-driven “quick-pair” setup that will be part of Android.

This method, called Bluetooth Fast Pairing, works on Android handsets and other devices that run Android 6.0 Marshmallow onwards and have Google Play Services 11.7 or newer installed and support Bluetooth 4.0 Low Energy (Bluetooth Smart) connectivity. You will have to enable Bluetooth and Location functionality in your handset, but you don’t have to look at Bluetooth device lists on your smartphone for a particular device identifier to complete the setup process.

Google Fast Pair in action - press image courtesy of Google

Click or tap this image to see Google Fast Pairing in action

It is meant to provide quick discovery of your compliant Bluetooth accessory device in order to expedite the setup process that is involved with new devices or to “repair” Bluetooth connections that have failed. This latter situation can easily occur if data in the device regarding associated Bluetooth devices becomes corrupted or their is excessive Bluetooth interference.

The user experience will require you to put your accessory device like a Bluetooth headset, speakers or car stereo in to Bluetooth-setup mode. This may simply be through you holding down the “setup” or “pair” button till a LED flashes a certain way or you hear a distinct tone. On the other hand in the case of home and car audio equipment that has a display of some form, you using the “Setup Menu” to select “Bluetooth Setup” or something similar.

Then you receive a notification message on your Android device which refers to the device you just enabled for pairing, showing its product name and a thumbnail image of the device. Tap on this notification to continue the setup process and you may receive an invitation to download a companion app for those devices that work on the “app-cessory” model for extended functionality.

Google implements this by using Bluetooth Low Energy “beacon” technology to enable the device-discovery process. This is similar to the various beacon approaches for marketing and indoor navigation that are being facilitated by Bluetooth Low Energy, but they only appear while your accessory device is in “Bluetooth setup” mode.

The Google Play servers provide information about the device such as its thumbnail image, product name or link to a companion app based on a “primary-key” identifier that is part of the Bluetooth Low Energy “beacon” presented by the device. Then, once you tap the notification popup on your Android device, the pairing and establishment process takes place under Bluetooth Classic technology.

I see this also as being similar to the various “Plug And Play” discovery process implemented in Microsoft Windows and Apple MacOS whenever you connect newer peripherals to your computer. This is where Microsoft and Apple keep data about various peripherals and expansion cards that are or have been on the market to facilitate installation of any necessary drivers or other software or invocation of class drivers that are part of the operating system. For Google and the Android platform, they could take this further with USB-C and USB Micro-AB OTG connectivity to implement the same kind of “plug and play” setup for peripherals connected this way to Android devices.

This system could be taken further by integrating similar logic and server-hosted databases in to other operating systems for regular and mobile computer platforms to improve and expedite the setup process for Bluetooth devices where the host device supports Bluetooth Low Energy operation. Here, I would like to see it based on the same identifiers broadcast by each of the accessory devices.

The Bluetooth Fast Pairing ability that Google gave to the Android platform complements NFC-based “touch and go” pairing that has been used with that platform as another method to simplify the setup process. This is more for manufacturers who don’t have enough room in their accessory device’s design to provide an NFC area for “touch-and-go” setup thanks to very small devices or where NFC doesn’t play well with the device’s aesthetics or functionality.

It may be a point of confusion for device designers like Alpine with their car stereos who place their devices in “discoverable” or “pairing” mode all the time so you can commence enrolling your accessory device at your phone’s user interface. Here, the device manufacturer may have to limit its availability to certain circumstances like no devices paired or connected, or you having to select the “Bluetooth” source or “Setup” mode to invoke discoverability.

At least Google have put up a way to allow quicker setup for Bluetooth accessories with their Android platform devices without the need to build the requirement in to the hardware.

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Bose offers headphones optimised for Google Assistant

Article – From the horse’s mouth

Bose QuietComfort QC35 II noise-cancelling Bluetooth headset optimised for Google Assistant - Press picture courtesy of Bose Corporation

Bose QuietComfort QC35 II noise cancelling Bluetooth headset optimised for Google Assistant – a sign of things to come for mobile audio accessories

Google

Headphones optimized for the Google Assistant (Blog Post)

Bose

Redefines Sport Headphones with Truly Wireless SoundSport Free (Press Release)

QuietComfort QC35 II Wireless Headphones (Product Page – USA)

– Bluetooth circum-aural closed-back noise-cancelling headset

My Comments

A trend that will be surfacing with the voice-driven personal assistants is that the speaker or headset device doesn’t need to be directly connected to a home network to access the Internet.

Here, some of these devices will connect to a computer or mobile device via Bluetooth or a similar technology but work in an “app-cessory” manner with a vendor-supplied app. Here, this app will serve as a gateway to a voice-driven personal assistant platform which can be hosted natively or through an add-on app, with this function activated through a dedicated button on the audio accessory device.

The first example of these is the Bose QuietComfort QC35 II which is an active noise-cancelling over-the-ear headset, but this setup will also appear with more headphones products from Bose. In this case, the headset connects to the smartphone via Bluetooth and works with a Bose-supplied control app but works hand in glove with the Google Assistant app, available for Android and iOS.

But all audio accessories should be able to work with Siri, Google Now, Bixby and Cortana

There is a special button on the Bose QuietComfort headset that is mapped by the control app to trigger Google Assistant while messages that come in are read by Google Assistant in a text-to-voice manner. You will expect the Google Assistant to do what it can including providing voice-driven access to resources. This is while the headset is optimised to work at its best with voice recognition even when faced with noisy environments like public transport.

As I was highlighting in the last paragraph, such devices will be acoustically optimised for error-free voice recognition, preferably with the chosen platform. One method that will be commonly used would be to implement a microphone array that uses the multiple microphones to focus on the user’s voice.

This will be augmented with dynamic sound enhancement for the voice-driven personal assistant platform so that you can hear the personal assistant clearly when it replies.

But could these headphones and speakers be seen as a gimmick when any wired or Bluetooth headset can work with your mobile platform’s integral voice assistant without the need for any extra software? This is where you can, for example, dwell on the “call” button on your headset to invoke Siri or Google Now, then interact with that assistant to make a call or send a message for example.

Personally, I would just like to see the voice-recognition abilities of an audio accessory improved so that they can work with whichever voice-driven personal assistant you use. This would be in the form of something like microphone arrays or something similar, along with a standard function mapping for voice-assistant buttons. Similarly, audio adaptors and wearables like smartwatches and fitness bands could be focused towards supporting the “visual component” of voice-driven personal-assistant platforms by showing visual information on their displays that augment the voice-driven experience.

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Mixing audio and Bluetooth Low Energy–what is happening

Article

Sony SBH-52 Bluetooth Headphone Audio Adaptor

Audio over Bluetooth Low Energy could make these devices last for a long time on a single battery charge

Apple Used Bluetooth Low Energy Audio for Cochlear Implant iPhone Accessory | MacRumors

My Comments

Any of you who have used Bluetooth headsets with your smartphones may have come across situations where the headset ceases to function or sounds the “low battery” signal when you use these devices a lot. This can happen more so if you are listening to music then make or take a long phone call using the headset and is something I had experienced many times with the Sony SBH-52 audio adaptor. But the audio protocol is being worked on to avoiding consuming too much battery runtime.

Plantronics BackBeat Pro Bluetooth noise-cancelling headphones

.. as it could with Bluetooth headsets

Apple and Cochlear, who are behind the Australian-invented Cochlear Implant hearing-assistance technology, have developed Bluetooth Low Energy Audio to provide a high-quality audio link between mobile devices and headsets but make very little demands on the battery. As well, the Bluetooth Special Interest Group are working on a similar protocol to achieve these same gains, with the goal to have it part of Bluetooth 5.0. But this has to be supported in a vendor-independent manner in the same context as the current Bluetooth audio technologies that are in circulation.

But why is there an imperative to develop a low-energy audio profile for Bluetooth?

One key usage class is to integrate Bluetooth audio functionality in to hearing aids and similar hearing-assistance devices that are expected to run for a very long time. Here, we are also talking about very small intra-aural devices that may sit in or on your ear or be integrated in a set of eyeglasses. The goal is to allow not just for audio access to your smartphone during calls or multimedia activity but even to have an audio pathway from the phone’s microphone to the hearing-assistance device as well as the phone being a control surface for that device.

Similarly, there is a usage goal to improve battery runtime for Bluetooth headsets and audio adaptors such as to avoid the situation I have described above. It can also cater towards improved intra-aural Bluetooth headset designs or lightweight designs that can, again, run for a long time.

Let’s not forget the fact that smartwatches are being given audio abilities, typically to allow for use with a voice-activated personal assistant. But devices of this ilk could be set up to serve full time as a Bluetooth headphone audio adaptor with the full hands-free operation. The expectation here as well could even be to have the display on the wearable active while in use, whether to show the time, steps taken or metadata about the call in progress or whatever you are listening to.

Once audio over Bluetooth Low Energy technology is standardised, it could be a major improvement path for Bluetooth-based audio applications.

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USB Audio 2.0 now supported in Windows 10 Creators Update

Article

HP Elitebook 2560p playing through Naim DAC-V1 USB DAC

Windows 10 Creators Update now provides native support for USB Audio 2.0 to allow these devices to run at their best out of the box when connected to a Windows PC

Confirmed: Windows 10 now supports USB Audio Class 2.0 | GadgetGuys

My Comments

For those of you who run highly-strung USB audio hardware like pro-quality USB analogue-digital interfaces or those audiophile-grade USB digital-analogue converters, the latest version of Windows 10 offers something for you.

It is to provide native driver support for USB Audio 2.0, the second version of the USB Audio device class that handles sound over the USB bus. These audio devices work independently of the USB physical connection type therefore they could work with a USB 2.0 connection, the higher-speed USB 3.0 connection or the USB-C connection. This version can handle higher-definition master-grade audio beyond the 24-bit 96kHz digital-audio specification. It also can natively handle the DSD files that started off with SACD discs and are another way of distributing high-definition master-grade audio content.

This improvement to the USB Audio standard was supported natively by MacOS and Linux but wasn’t supported by Windows. Instead, people who wanted to get the most out of their USB DAC or USB audio studio hardware had to install a driver file that was supplied by the USB audio device’s manufacture, either through a CD or USB stick supplied with the device or something to download from their Website.

Now if your computer is running Windows 10 Creator’s Update, it will be a simple plug-and-play install process to have Windows Media Player or Tidal coming through that USB DAC. But this is facilitated through the Windows DirectSound or WASAPI software-hardware audio paths.

The drivers that will come with your device may offer a highly-strung experience such as to work via higher-performance audio APIs other than the two previously-mentioned paths. As well, they may offer a control panel that allows you to better manage how the sound is handled.

Similarly, there may be other drivers that map the USB audio device’s control surface to Windows 10 in a manner more consistent with the manufacturer’s functionality expectations for that device. Examples of this may include mixing desks and DJ consoles with media transport buttons.

For manufacturers who design highly-strung USB audio devices, there is less of a requirement to write up and maintain software drivers for these devices. This can same them money and focus their R&D efforts on improved sound quality.

Hooray! Your Windows computer now can work out of the box with that USB-connected premium audio device with the full sound-quality expectations.

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Apple to use the UAC connector as its standard connector for headphones

Articles

Dell A2 Performance USB Headset

Feature headphones with digital functionality will be using UAC as an accessory-side connector for widest compatibility

Relax, Apple isn’t introducing another new connector | The Verge

Apple’s Ultra Accessory Connector dashes any hopes of a USB-C iPhone | The Verge

Apple plans new smaller Ultra Accessory Connector (UAC) for Made-for-iPhone accessories | 9 To 5 Mac

What is UAC? Apple’s new ‘Made for iPhone’ accessory and port explained | Trusted Reviews

My Comments

If you have owned a Nikon digital camera, you may have dealt with the Ultra Accessory Connector (UAC) as a method to tether your camera to your computer for, perhaps, downloading. This would typically be facilitated using a USB to UAC cable that came in the box with your camera.

Apple is resurrecting this connector as part of its MFi (Made For iOS) accessories program for iOS devices. There was a lot of confusion in the computing press regarding this connector because it could be about a different socket existing on a subsequent iPhone or iPad, or devices and accessories not working unless “you get with the program” – be part of the Apple ecosystem.

But the Ultra Accessory Connector is about how its use as an intermediary or accessory-side connector on a pair of headphones. It is being called on because an increasing number of newer smartphones and ultraportable laptops won’t be equipped with the traditional 3.5mm headset jack where you can connect a wired headset.

There is also the same appeal where headphones will have integral digital-analogue audio circuitry and there has to he a way to connect these to your smartphone if you are going the “wired” path. It is something very familiar to those of us who use a USB headset with our computers or a Bluetooth headset or audio adaptor with our smartphones. Here, manufacturers will see better digital-analogue circuitry and / or sound-processing technology such as microphone arrays, accessory-side sound-tuning and active noise cancellation as a way to differentiate their product ranges more effectively and  innovate their products.

Dell AE2 Performance USB Headset - USB plug

It will still be feasible to keep a level playing field for headphones that use USB or other wired digital links.

The approach that is being pushed here is for a headset or pair of headphones to have the UAC connection as an accessory-side connection. Typically this will be as a “lump” on the headphone cable like what is used for remote control or a microphone, which comes apart. On the other hand, the most probable implementation for a pair of traditionally-styled “cans” would be a socket installed on one of the earcups similar to what happens for detachable-cord implementations. The headset would then be supplied with one or more application-specific connection cables that have a UAC-connector on the accessory side and the appropriate connector (Apple Lightning, USB-A, USB-C or 3.5mm phone plug) on the equipment side. There is also a goal to have such cables also available through the aftermarket thanks to accessory suppliers like Belkin.

The UAC connection is meant to facilitate a digital connection that works with USB or Apple Lightning norms along with the standard stereo analogue connection. Here, it means that an accessory cable can exist which has the traditional 3.5mm phone plug on it to allow use with equipment that still maintains this connection. This includes still being able to use the 6.35mm headphone jack adaptor to connect your headpbones to hi-fi equipment or the two-pin airline adaptor to plug in to your aeroplane seat’s in-flight-entertainment connection. It also encompasses the goal with the Apple Lightning and USB-C standards to provide analogue pass-through from equipment-side digital-analogue circuitry to cater for the cheaper headset designs.

In the digital context, this can mean that the sound processing circuitry can present itself to Apple’s iOS devices or “open-frame” USB Audio implementations properly as the equipment expects. Apple still sees this as being important because their newer MacBook laptops are being equipped just with USB-C connections and MacOS is still providing class-driver support for USB-Audio devices. But most other regular-computer and mobile operating systems are providing a similar level of support for USB Audio.

But what needs to happen in both camps is for proper operating-system-level support for audio input and output in both the communications and multimedia contexts, along with accessory-side remote control for call management, media transport control and volume control at least. It may also include the ability to use a basic display on the accessory to show information like current time, incoming calls and messages and media-play details, something that can earn its keep with in-line remote-control accessories.

The UAC connection type can lead to the idea of “feature modules” or “enhancement modules” that add extra functionality to or improve the sound quality of existing UAC headphones. For example, they could offer:

  • a highly-strung DAC circuit as an upgrade path for better sound quality with premium headphones;
  • a Bluetooth adaptor to add Bluetooth wireless functionality to a set of existing wired “cans”;
  • an advanced remote control with display so you can keep your device in your pocket;
  • or an extended-power module which allows you to use external battery packs to obtain long operating times out of your smartphone and advanced headset.

What the UAC connector that Apple is pushing for is the ability to headset manufacturers to continue to work on feature headsets that can work across all of the computing platforms. As well, I also see the UAC connector as a pathway to innovation because manufacturers will be encouraged to work on features that work across all phone platforms. This is more so as we invest in the premium headsets to go with our smartphones and computers so we can listen to music or watch those videos while we are on the train.

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Product Review–Dell AE2 Performance USB Headset

Introduction

I am reviewing the Dell AE2 Performance USB Headset which is a USB-connected gaming headset designed by SteelSeries on behalf of Dell.

This is a practice that a lot of manufacturers, distributors and retailers in the computing and consumer-electronics game have been involved in where they ask someone else to design and make the product to be sold under the client’s name. Infact, most of the Japanese consumer-electronics names had engaged in the practice themselves, either making “white-label” products for other companies to sell under their own labels or being the companies who called on others to design and build products.

One of the ways you would know that this headset was a SteelSeries design was the speaker cloth on the earcups had the label “Acoustics by SteelSeries” written on it. As well, I had a look through the product documentation and it required me to install the SteelSeries Engine software to be installed on my computer so I could gain more control over the headset.

Dell AE2 Performance USB Headset

Price

RRP: AUD$99 / US$49.99 / GBP£66.76

Shop Now – US / Australia / UK and Europe

Headset Type

Headphone Assembly Traditional over-the-ear
Driver Positioning Circum-aural (covers the ear completely)
Driver Enclosure applies to circum-aural or supra-aural designs
Closed back
Primary sound path Digital
Microphone position Microphone integrated in left earcup

Functionality

Pitched for Gaming
Active Noise Cancellation No
Remote Control Mic Mute

Connectivity

Connection for main operation Wired
Wired path USB Audio via Type-A
Supplementary adaptors None

The headset itself

Dell AE2 Performance USB HeadsetThe Dell AE2 Performance USB Headset is designed like most circum-aural headsets and implements the USB bus as its way of connecting to host devices. As to appeal to the gaming community, each earcup has a glowing white ring which illuminates when you have the headphones plugged in to your computer. But, as I have said later on in the review, you can determine whether this glowing occurs or not or what colour is used thanks to a configuration program called SteelSeries Engine.

I have done most of the reviewing of this headset without using the SteelSeries Engine control software, which would represent requirements where you can’t or don’t want to add extra software to your computer to gain more out of these headphones.

Connectivity and Functionality

Dell AE2 Performance USB Headset - USB plug

How the Dell AE2 headset connects to your computer

The Dell AE2 Performance Headset connects to USB-equipped computing devices using its USB Type-A connector and presents itself to them as a USB Audio input and output device. Windows 10 was able to even identify this headset as headphones and give this device priority over existing default audio devices like integrated speakers in a monitor or laptop. The headset has a maximum rated power draw of 150mA which means it shouldn’t place much demand on your laptop’s battery power as well as being able to work comfortably on a four-port bus-powered USB hub being used by input devices.

I had tried using this headset with my Samsung Galaxy Note 4 Android smartphone by connecting it to the phone via a USB OTG cable. Here, it would work as a USB Audio device but I had found that this functionality didn’t extend to communications tasks like using the phone. Here, I would communicate with the caller via the smartphone’s speaker and microphone rather than through the Dell USB headset. The USB-based audio device as a mobile-phone accessory is becoming a reality thanks to USB Type-C connectivity and manufacturers doing away with the 3.5mm audio jack on their phones.

SteelSeries Engine 3 configuration screen for Dell AE3 Performance USB headset

SteelSeries Engine 3 configuration screen – graphic equaliser, DTS surround sound, etc

You can run the SteelSeries Engine 3 software on your Windows or Macintosh computer, which effectively allows you to gain more control over the headset. This program offers a DTS Headphone 7.1 surround decoder for headphone applications, a five-band graphic equaliser, a microphone-optimisation program along with the ability to control the lights on the earcups. You could even have the lighting change colour based on games events which works for some games thanks to API hooks that SteelSeries have published for game studios to use.

This program works properly as advertised and you don’t need to have it running all the time you use the headphones, which can be a boon for those of us who use laptops while on battery power.

Comfort

Dell AE2 Performance USB Headset - SteelSeries motif

SteelSeries design highlighted in earcups

These headphones are very comfortable to wear for a significant amount of time thanks to the circum-aural design and the fact that your ears are not touching anything hard. As well, they don’t feel sticky after that long time of use because of assuring some airflow around the foam surrounds.

Sound Quality

The Dell AE2 Performance USB Headset is able to handle music in a similar manner to most circum-aural headphones by being able to put up some good bass response. It was also able to work well with the vocals and other instruments but you may experience a bit of reduction of higher frequencies – it is not really something with hi-fi credentials for listening to detailed music.

Dell AE2 Performance USB Headset - glowing ring on earcups

Glowing ring on earcups

I have also tried these headphones with some video content in the form of watching an Inspector Morse episode (Sins Of The Fathers) from a DVD using my desktop computer. Here, the dialogue came across very clearly and I was able to hear the sound effects distinctly with the added bass response doing some justice to certain effects like the rumbling heard in the brewery that was part of the story. There were a few brewery scenes in that same show which represented a sound presentation not dissimilar from what would be expected from a lot of action-based computer games with people traipsing around the factory, the rumbling of machinery and the music score, with the Dell AE2 Performance USB Headset handling them very well.

I had placed a call using Skype to someone I know and they had noticed that I was able to come across very clearly with the headset while I was able to hear them very clearly. The Dell AE2 headset can earn its keep as a communications headset for VoIP softphones and similar online calling platforms, especially if they implement high-quality voice codecs.

Noise Reduction and handling of noisy environments

The Dell AE2 headset offers a significant amount of noise reduction which can be a boon for those of us who are commuting or working in a noisy office. It may not be as effective as active noise cancellation but can suit most of us in these environments.

Limitations and Points Of Improvement

One of the problems that will need to be answered with these USB headsets is for all mobile operating systems to treat them as headsets when they are connected to mobile devices.

Another desirable feature would be to have a hardware switch on the headset that turns the lighting on and off so you can be able to reduce your laptop’s battery drain when you run them and avoid the need to run a configuration program to achieve this goal. As well, headsets of this kind could benefit from a volume control on the earcups that controls the host system’s volume using the standard USB protocols.

Similarly, Dell and SteelSeries could implement a USB Type-C detachable connection so that they can be provided with a detachable cable allowing them to last longer by allowing you to replace damaged cables. This would also cater towards the newer USB Type-C direction as more of the computers come with this connection.

Conclusion

Personally, I would position the Dell AE2 Performance USB Headset more as suitable as a general-purpose computer headset for applications where you want to hear your computer software’s audio privately but are not expecting to pay attention to how music comes across through them. This is rather than just as something for chatting during games or hearing games effects privately and intensely.

The Dell AE2 Performance USB Headset also represents a newer trend for headphone construction where there is emphasis on “digital to the earpiece”, which can open up many points of innovation like optimised sound or active noise cancellation. The USB connectivity allows for this to work for wired-headset setups including allowing the host device to actually power the headset.

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Bone-conductivity technology rises in the common space once again

Article

Check out these cool sunglasses with built-in bone conducting headphones | Android Authority

From the horse’s mouth

Zungle

Kickstarter campaign

Video – click or tap to play

My Comments

In the early 1980s, an electronics company tried out a common application for bone-conductivity personal audio technology by selling to a mail-order gadget-supply company and to Radio Shack (Tandy) an AM/FM stereo headphone radio that implemented this technology. This radio, known as the “Bone Fone” and powered by 4 AA batteries, dropped around your neck like a shawl and used bone-conductivity technology to bring your favourite broadcast’s audio to your ears.  You were able to hear your music privately through the sound being transduced through your neck clavicle bone to your ears.

It was found to be heavy but the technology has resurfaced in another application that would be seen to be popular. This time it is a pair of sunglasses that use an integrated Bluetooth headset that exploits this technology. These Zungle Panther sunglasses, modelled on the Oakley Frogskins, don’t require you to wear headphones or an earbud to hear your music or caller due to this technology. Rather they use your skull bone as the transducing surface.

These glasses link to your smartphone using Bluetooth 4.1 technology as a way to save battery runtime for both devices. They also implement a jog wheel to allow you to control audio playback as well as implementing a noise-cancelling microphone when you make and take calls or ask something of Siri, Google Now or Cortana.

For their power, the bone-conducting Zungle Panther glasses implement a 300mAh battery that uses the same microUSB charging connectivity as most of the current Bluetooth headsets.

Because of what they do, they may be considered to be bulky like a set of 3D glasses used for watching a 3D movie at the cinema but they weigh in at 45g. They were found to earn their keep for cyclists and other road users who want to keep their ears open to hear for traffic.

There is actually a Kickstarter campaign to get the bone-conductivity glasses idea off the ground with a starting price of US$99.

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Vizio to equip their latest soundbars with Google Cast Audio

Article

Google Cast will come stock on Vizio’s new soundbars | Android Authority

Vizio takes on Sonos with Google Cast-friendly soundbars | Engadget

From the horse’s mouth

Vizio

Product Page

Blog Post

Press Release

My Comments

Increasingly Google is encouraging companies involved in consumer audio-video to integrate Google Chromecast audio or video functionality in to their devices. This avoids the need to purchase and install a Chromecast dongle to benefit from audio and video streaming from online services.

Sonifi brought this concept in to the hotel scene so you can lie on your hotel-room bed and watch Netflix managed by your Android phone while Vizio, Sony and Philips are implementing it in to their TVs. Google even implements this concept in to their Google Fiber TV set-top boxes so that you don’t need a Chromecast dongle for this functionality. But Vizio has taken things further with Google Cast for Audio by offering this functionality in their latest range of sound bars.

Typically, you may think that a company may offer this function just to one soundbar or speaker base in their lineup but Vizio has offered it across the board for their up-and-coming SmartCast soundbars. These will work as Google Cast Audio devices where they can play online audio sources like Pandora or Spotify rather than being a “soundbar + Chromecast” device that adds Chromecast to your TV.

One article sees these soundbars as an answer to the Sonos multi-room sound system and nothing is further from the truth thanks to Google’s latest Chromecast software. Here, you could gang these speakers together in a “party mode” or have them playing different programs in a similar way to what you can do with Sonos. Let’s not forget that you can have something like Spotify or Pandora playing and the music isn’t interrupted if a call comes in or one of your phone’s apps throws a notification signal. It also means that the ringtone or the notification sounds don’t blast through your Google Cast setup’s speakers.

As for the price, the cheapest unit, which is a 38” 3.0 setup costs US$180 while the most expensive models being the 45” 5.1 setup that comes with surround speakers and a slim subwoofer runs for US$500.

Who knows who will launch the first stereo or home-theatre receiver or stereo system that has integral Google Cast functionality or if an existing multiroom audio platform will end up with Google Cast integrated in to it.

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Why call for the 3.5mm headphone jack to be replaced on mobile devices

Article

Intel Thinks USB-C Should Replace the Headphone Jack | Gizmodo

My Comments

Could this be the new audio connection for your smartphone?

Could this be the new audio connection for your smartphone?

Intel has raised the possibility that the common 3.5mm headphone jack not exist on a smartphone or similar audio device. Here, they would rather that the USB Type-C connection serve as the phone’s audio connections.

There was a similar outcry when Apple proposed this idea for a newer iPhone design by requiring the use of their proprietary Lightning connection as the audio connection.

The problem is that the 3.5mm phone jack has been established as the common way to connect mobile devices to headphones and audio equipment.

The Intel approach requires the use of the USB Type-C connector which implements standards accepted by all of the industry. It is different to Apple’s approach because the Android and Windows platforms place a high expectation on the concept of “open-frame” computing where there is a preference for hardware and software standards and specifications accepted by many different vendors rather than the one vendor.

Plantronics BackBeat Pro Bluetooth noise-cancelling headphones

High-end headphones like these noise-cancelling headphones could be powered by your smartphone or laptop

Firstly, there is the USB Audio Device Class which has allowed for USB sound modules and USB DACs to exist without the need to add extra drivers. This can allow for a high-grade digital-analogue converter to be integrated in a high-quality USB headset or supplied as a phone-powered USB sound-module accessory that you plug your high-quality headphones in to.

For headphones, this could lead to ideas like surround-sound processing such as to use hardware to convert Dolby Digital or DTS surround sound to Dolby Headphone surround sound. It could permit the headphones to implement sound processing such as equalisation or echo cancellation so they sound their best in all situations. Even when you speak in to the phone, the newer technology will provide some benefit such as using a microphone array to catch your voice better.

To the same extent, a USB sound module that works with high-grade microphones could open up paths for your smartphone to make good recordings for your podcast or video.

Technics Grand Class G30 hi-fi system with media server press image courtesy of Panasonic

You may soon find amplifiers and stereos equipped with a USB Type-C connection on the front so you can play our new smartphone through the speakers

Another path is to use the Multimedia Transport Protocol that operates over the USB connection to play music through your car stereo or home stereo system, using the music system’s control surface to navigate your audio content while the currently-playing music details show up on the music system’s display.

Intel’s idea also investigated the possibility of an analogue-audio connection via the USB Type-C connection to cater to the budget end of the accessories market. This is to allow for headsets and audio adaptors that have no digital-audio functionality to exist.

Another common device class is the USB Human Interface Device Class which is used primarily with mice and keyboards but there is a subset of “called-out” control types that highlight consumer-electronics and business device control applications like transport control or call control. This could open the path for USB headsets and adaptors to have full control for calls and music like the full AV transport-control quota or two-button call control.

The power-supply option that USB Type-C offers allows for the phone to power active-noise-cancelling headphones or headphone amplifiers. Similarly, an audio accessory like a stereo system or an audio adaptor that has a high-capacity battery could provide power to the phone.

The Sony SBH-52 Bluetooth Headphone Adaptor - one of the Bluetooth adaptors that may be necessary for newer smartphones

The Sony SBH-52 Bluetooth Headphone Adaptor – one of the Bluetooth adaptors that may be necessary for newer smartphones

Bluetooth will still exist as a wireless audio-accessory connection alternative as long as the phone and accessory still work to the established Bluetooth Profiles for their applications.

Kingston HyperX Cloud II headset USB adaptor

This USB audio adaptor could be considered as a way to connect existing headphones to your new smartphone

The idea that we will lose the ability to use our favourite audio systems and headphones that depend on the classic 3.5mm phone jack when we get a newer handset can be nullified when we use a USB sound module for a wired connection to our smartphones. As I mentioned before, those of us who appreciate the high-quality sound could end up benefiting from this kind of accessory especially where it is optimised for that kind of sound. An example of a USB sound-module device that I had dealt with was one that came with the Kingston Hyper-X Cloud II gaming headset that I previously reviewed, which presented itself to Windows as a USB Audio input and output device. If we want the wireless link, we could look for that Bluetooth audio adaptor typically sold with a pair of intra-aural earphones and connect our favourite headphones to this device like I do with the Sony SBH-52.

If this proposition is to work properly, the sound-processing circuitry need also to be power-efficient so you don’t end up draining your smartphone’s battery or depending on external power supplies to use your smartphone. Similarly, other accessory vendors may need to add USB Type-C hub functionality to their accessories like USB battery packs so that these headphones can work while the smartphone is being powered from the battery pack. Or the smartphone vendors may have to concede to having 2 USB Type-C ports on their phones to support USB headphones and USB external power supplies for example.

But whatever happens, this could open another path for innovation to take place when it comes to the supply of accessories for portable audio and video equipment.

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The 3.5mm digital-analogue audio socket is still relevant for today’s portable computing equipment

Laptops like the Toshiba Satellite Radius 12 could benefit from a 3.5mm digital-analogue audio output jack for an audio connection

Laptops like the Toshiba Satellite Radius 12 could benefit from a 3.5mm digital-analogue audio output jack for an audio connection

Increasingly, there has been the rise of portable audio equipment associated with computers and there are opportunities to exploit what this all about for better sound.

Most of this equipment is implementing a 3.5mm tip-ring-sleeve phone socket for analogue line-level audio input or output connections. This is because the socket type is considered to be a “low-profile” connection that allows the equipment to be designed to be slim and neat. The same connector even appeals to the traditional PC expansion cards where the socket can easily exist on the card’s bracket.

Sony MZ-R70 MiniDisc Walkman image courtesy of Pelle Sten (Flickr http://flickr.com/people/82976024@N00)

One of the Sony MiniDisc Walkmans that implemented a 3.5mm digital-analogue audio input jack

Some devices, namely video projectors use the 3.5mm phone jack for this purpose, whether as an input or an output while this connector is also used as a so-called ad-hoc “walk-up” audio input or output connection on amplifiers or stereo systems such as an auxiliary input. This exploits the ability associated with the “phone” sockets where they can survive being connected and disconnected repeatedly thanks to their original use on the old telephone switchboards.

Sony took this connection type further during the MiniDisc era by equipping some of the CD Walkmans with a line-out jack that also had an LED in it and equipping their MiniDisc Walkman recorders with a mic/line input jack that had a photodiode in this socket. Then the user would connect a fibre-optic cable with 3.5mm fibre-optic connections on each end to provide a digital link between the CD Walkman and the MiniDisc Walkman to digitally copy a CD to MD with the sound transferred in the SP/DIF digital domain.

Economy data projector with VGA input sockets

HDMI-equipped projectors could even exploit the 3.5mm digital-analogue output connection for use with sound systems that have a digital input

You would still be able to connect the portable device to a normally-sessile device like a digital amplifier by using an adaptor cable which had a Toslink plug on one end and a 3.5mm fibre-optic connection on the other end or use a Toslink-3.5mm adaptor with an existing Toslink fibre-optic cable.

A few other companies exploited this connection beyond the portable realm with Pace implementing it as a digital audio output on some of the cable-TV / satellite-TV set-top boxes. The set-top application implemented this connection just for the digital-audio application while the analogue audio connection was facilitated through the multiple-pin SCART connection.

This same single-socket connection could be easily implemented for a video projector that uses an HDMI input and a 3.5mm audio-output jack so you could have a digital connection to a sound system rather than an analogue audio link. This can also apply to laptop computers which are increasingly being purposed as party jukeboxes by younger people along with “mini-DJ” accessories pitched at iPod/iPhone users who want to play DJ.

Conversely, TVs and stereo systems could implement the same digital/analogue input for the auxiliary-input connection that is reserved on a TV for computer equipment or on the front of a stereo system for “walk-up” connection of portable digital-audio players.

As far as equipment design is concerned, the single socket for a SPDIF-optical-digital or analogue audio connection saves on designing and budgeting for two sockets if you want to facilitate both a digital and an analogue audio connection.  This is more important if the goal is to design equipment that has a low profile or is highly portable. The same approach can also appeal to providing for an ad-hoc digital/analogue input or output where the connection exists on an “as-needed” basis rather than a permanent basis.

Personally, I would like to see the 3.5mm digital-analogue audio jack that Sony valued during MiniDisc’s reign as something that can work with portable computing equipment, video projectors, smartphones and the like for transmitting audio in the SPDIF digital domain.

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