Tag: high-resolution audio

Google Chromecast Audio–the heart of a wireless multiroom audio setup

Article

Chromecast Audio Gets Hi-Res Audio, Synced Songs | Tom’s Guide

Chromecast Audio Is Now The Super Cheap Way To Wirelessly Fill Multiple Rooms With Music | Gizmodo

From the horse’s mouth

Google

Blog Post

My Comments

Those of us who own or are considering a Google Chromecast Audio device should apply the latest firmware update to this device. It will add two key functions to this device that will improve sound quality and useability.

If you connect a Google Chromecast Audio to one of the latest top-notch hi-fi amplifiers, you can let this amp rock when you feed the Chromecast “master-grade” (96kHz / 24-bit) FLAC files. You may be able to pick these files up from any “download-to-own” online-music store that courts audiophiles and offers the “master-grade” content.

As well, having multiple Chromecast Audio devices with this latest firmware can allow you to create a multiroom audio setup. Here, you use your Chrome extension program or Chromecast mobile app to create an ad-hoc synchronous playback setup involving one or more of these devices.

The low cost, typically of US$35, may make the Chromecast Audio appeal as a cheap option to connect a pair of active speakers, that 1980s-era “ghetto blaster” or a stereo system to your home network. It could even be seen as a “stocking-stuffer” gift that could earn its keep beyond the Christmas shopping season.

FLAC studio-grade audio files to be supported by Windows 10

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

Windows 10 could allow this HP laptop and Naim USB DAC to handle FLAC files without extra software

Article

Windows 10 will play your .MKV and .FLAC files all on its own | Engadget

My Comments

As I have observed through the previous Australian Audio And AV Shows, there is increased interest in high-resolution file-based audio. Here, these studio-grade recordings or remasters of classic albums from the studio master tapes are being offered as a “download-to-own” digital audio option along with the regular CDs and MP3 files.

These files would be enjoyed either through a DLNA setup involving a network media player that can handle these files or a regular computer connected to a USB DAC (essentially a USB sound module) connected to the amplifier. But the latter scenario would typically require the use of add-on software and codecs to realise the FLAC audio files for the onboard or external digital-analogue conversion devices to turn in to amplifiable audio signals.

As part of many improvements to the operating system, Microsoft is integrating into Windows 10 the necessary software to decode these high-grade digital files. This is to avoid running a third-party codec pack that may be unstable or be part of a hasty download. Instead it is software that is effectively tuned to run with the operating system and play well with Windows Media Player.

Auralic Taurus control amplifier connected to Auralic Vega DAC

Auralic USB DAC – no extra software or codecs needed to handle FLAC files from Windows 10 onwards

For audio software developers who write for Windows, there isn’t a need to “reinvent the wheel” when catering to this high-quality codec for “download-to-own” digital audio. As well, it is an attempt to make the FLAC file become the “new MP3” file for distributing file-based audio content.

Personally, I would also like to see Microsoft write the necessary codec software to allow the creation of these files so as to take some work off the hands of anyone who is creating digital-audio-workstation software for Windows. It could increase the ability for Windows to become a highly-capable multimedia creation workhorse that is on a par or better than Apple.

Consumer Electronics Show 2014–Part 1 (Home Entertainment)

I am reporting about this year’s Consumer Electronics Show which was held in Las Vegas and is effectively becoming a trend-setting show when it comes to the online lifestyle. This will be spread over a few parts so as to capture the main trends with the first part covering home entertainment.

Televisions

Every consumer-electronics trade fair always touches on technologies to do with televisions and video-based entertainment with two key trends affecting this class of product.

4K Ultra-High-Definition TV

4K UHDTV - Sony press image

4K UHDTV – The symbol of the Consumer Electronics Show 2014

This year is being seen as a make-or-break year for the 4K ultra-high-definition technology what with screen sizes starting at 49” and reaching to 110” in some quarters. But do most of us have the wall-space in our living rooms to accommodate a 110” TV screen?

We are also seeing a few manufacturers, namely Samsung and LG offer curved-screen TVs that yield the experience of the curved cinema screen that was brought on with the Cinemascope and Panavision wide-screen cinema technologies of the 1950s. Some manufacturers even are working on the concept of having a display that appears flat one minute then curved the next.

As well, this year is becoming a point where the TVs are becoming cheaper and available at 50” screen sizes. For example, Polaroid are putting up a 50” 4K set at US$999. Similarly most of the other manufacturer are offering a variety of models such as Sony offering the XBR-X950B at 65” and 84” screen sizes, the XBR-X900B at 79”, 65” and 55” along with the XBR-X850B at 70”, 65”, 55”, and 49”, all of which implement their Triluminos and Clear Audio + improvements along with  Wi-Fi networking, NFC and Miracast. Sony are even fielding a short-throw 4K video projector that can throw an image of around 103” but this would be considered big time for most households and small business. What I still see of this is that the sets will still be at a point where they are an upgrade for the main-viewing-room TV set with the fact that existing 1080p sets will end up being “pushed down” to secondary areas.

As for content, the main bearer for 4K-grade content will be through the home network courtesy of video-on-demand services. Services like M-Go, Amazon, Netflix, Sony Video Unlimited and YouTube have strong plans to run 4K content and build partnerships with the various TV manufacturers for delivering the content. Even Netflix is running the second season of “House Of Cards” in 4K and making it available at that quality. Sony are even going to run the FIFA World Cup 2014 soccer tournament in 4K video.

This is brought on through the use of H.265 codec or the VP9 codec and all of these sets will come with HDMI 2.0 connections for video peripherals.Qualcomm are also offering a processor which is optimised for 4K smart-TV applications. As well, Dolby have developed and premiered their Dolby Vision technology which optimises how the pictures are displayed on the screen according to the master – so the “Double-D” logo is not just about sound quality anymore.

Smart TVs

One major trend for smart TVs is for manufacturers to avoid reinventing the wheel when it comes to developing the operating systems for these sets. Here, they are working on implementing general-purpose operating systems like those of the Linux tree and shoehorning them to work with the “10-foot lean-back video-driven” experience that TV requires.

For example, LG is implementing the WebOS which was developed by Palm and HP in their smart TVs due to the improved user experience. For example the setup tutorial encourages users to get the most out of their sets through the use of a Clippy-style Bean-Bird mascot, along with a simple card-based switching user interface and relating to what device is being connected to a particular input. This is where, for example, you might see PS4 rather than HDMI 3 if you have a PS4 hooked up to the set’s “HDMI 3” input. Similarly, RCA and HiSense are toying with Android as an operating system for their smart TVs and Mozilla are working on a variant of the Firefox operating system for use with smart TVs and video peripherals.

MHL is becoming an increasingly-important connectivity feature for TVs launched through this year’s CES. This is brought on by Roku who are using the “Roku Ready” brand to say that their TVs can work with the Roku stick that connects between your TV’s MHL-capable HDMI input and your home network, making it become a smart TV using the TV’s own remote.

Other trends in this field include Samsung offering a simplified pebble-shaped remote control for their TVs which also supports gesture control along with Sharp running SmartCentral which provides search-level aggregation of the content that is available to you. Panasonic are also working on implementing facial-recognition in the application class while working with Mozilla to develop Firefox OS’s smart-TV implementation.

AV Peripheral Devices and Home Audio

Online Audio and Video

Even the separate audio and video equipment are taking on key online-enablement features. For example, an increasing number of Blu-Ray players and home-theatres are being equipped with Miracast technology to allow you to project the display from your suitably-equipped Windows laptop or Android mobile device on to your large-screen TV. Similarly, network-enabled audio equipment are becoming equipped with Spotify functionality such as Spotify Connect so you can benefit from the Spotify celestial jukebox on these devices as I mentioned in my coverage of the Australian Audio & AV Show 2013.

Audio Reproduction and AV equipment

One main trend being observed here is the increased interest in so-called “lifestyle” speakers such as soundbars and wireless speakers.

Many manufacturers are offering soundbars or pedestal speakers that have at least Bluetooth A2DP streaming with NFC “touch-to-go” setup. These are designed to sit in front of or underneath your flat-screen TV to provide a deeper better sound from these sets rather than using the set’s integrated speakers. A significant number of these units come with a wireless subwoofer to provide that meatier bass yet can be relocated easily without the need to worry about wires. Even Philips has shown up with a TV pedestal speaker that has an integrated Blu-Ray player that is a quick “leg-up” for adding Blu-Ray playback, smart-TV experience and better sound.

There are an increasing number of wireless speakers that work with Bluetooth A2DP and, in some cases Wi-Fi with DLNA or AirPlay functionality. For example, Sony are releasing the SRS-X7 and X9 with this functionality and a 2.1 layout that has a common bass driver.

Pure Jongo T6 wireless speaker

Pure’s wireless speakers and Internet radios to come Statesside

Regular readers of HomeNetworking01.info will know of Pure due to the Jongo speakers and some of their Internet radios that I have reviewed on this site. This brand has made an assault on the US with the Jongo T4 Wi-Fi/Bluetooth speakers along with the Evoke F4  FM/Internet radio with Bluetooth. This radio will also support Jongo synchronous multi-speaker functionality

But the WiSA wireless-speaker standard for high-quality sound has been premiered at this year’s CES with a Sharp Blu-Ray home theatre system that works as a WiSA wireless-speaker hub being used to work with Bang & Olufsen WiSA speakers including a new take on their legendary “pencil” column speakers.

CSR are working on improvements for Bluetooth speakers to allow multiple Bluetooth speakers to play in sync with each other from the one source, an improvement similar to their aptX codec which improves the audio playback quality of Bluetooth audio equipment. Similarly, Broadcom are working on the AllPlay SDK to make it simpler for manufacturers to integrate Wi-Fi with DLNA and AirPlay along with multi-speaker sync into wireless speakers and music systems

Also Sony are still pushing the HiRes Audio barrow that they did during the 2013 Internationaler Funkaustellung show in Berlin. Here, they are pushing the file formats and amplification abilities to their high-end Blu-Ray home theatres in the form of the BDV-N9200W, BDV-N7200W and the BDV-NF7220 two-speaker Blu-Ray home theatre amongst other devices that can play file-based audio content. These all have Wi-Fi, Bluetooth with NFC touch-and-go pairing, Miracast, and Spotify.

For that matter, Sony have refreshed their Blu-Ray player lineup, keeping them as a single unit that adds smart TV abilities to existing display devices. The top 2 models offer Miracast and have integrated Wi-Fi networking while every model except the entry-level model supports DLNA network media playback. They also have just released two single-piece CD/radio/Bluetooth stereos with NFC touch-and-go pairing. The more expensive model also has Wi-Fi with DLNA, AirPlay, Spotify Connect and the Internet-radio “band”.

Panasonic have released the SC-BTT465 and SC-BTT405 Blu-Ray home theatres which have Ethernet and are Wi-Fi ready needing the USB Wi-Fi dongle. Like most recent stereo equipment, they have  Bluetooth audio playback with NFC touch-and-go setup. As well, they provide access to the popular Internet video services. Like Sony, Panasonic have launched their latest Blu-Ray players as being “smart-TV enablers” with access to online services via Wi-Fi and their high-end BDT-360 is Miracast-enabled and has its own Web browser.

Still and Video Cameras

Connectivity to the network and Android-driven cameras

A key feature that is appearing on cameras across the board is the ability to use Wi-Fi to connect to a small network or be their own access point. This is augmented by cameras like the Polaroid Socialmatic and the Samsung Galaxy Camera 2 having direct access to social networks like Facebook or Instagram for uploading photos or cameras having the ability to benefit simply from Miracast or DLNA to show your pictures on the big screen.

The social-network ability is being augmented by cameras implementing Android rather than a reinvented operating environment, thus allowing for quicker application development and access to Android app markets.

Even Olympus has fielded a voice recorder that can upload audio files it captures to Dropbox via Wi-Fi technology. This is more as a way of saying that the dedicated voice recorder exists in the era of the smartphone and its voice-recording application.

Video cameras that shoot at 4K

Sony has come out with a consumer-tier video camera that can shoot to flash memory at 4K resolution. This camera, known as the FDR-AX100, sells for  USD$2000 and is equipped with Wi-Fi networking and NFC setup so you can exhibit those movies on that 4K TV. Of course it comes in the tried-and-trusted HandyCam handheld form-factor which would please most video hobbyists.

Action Cams

Sony and others are furthering the “action cam” which is a small video camcorder that attaches to various accessories to provide hands-free “first-person views”. These have been modelled on the GoPro action camera which clips to the various accessories.

Sony’s latest Action Cam, the top-shelf HDR-AS100V has live streaming, pro features and a splash-proof body and the ability to create time-coded movies for multiple angles in one picture efforts. There is an optional wrist controller with screen which also allows you to start and stop five of these cameras at the same time from this controller. This camera also joins the home network using Wi-Fi wireless and NFC touch-and-go setup.

Polaroid has joined the club by offering an entry-level “action cam” with not much in features but pitched at the same “social and casual” market, of course with the coloured body and rainbow stripe.

JVC has bucked this trend by offering a highly-ruggedised camcorder that can work in very extreme environments yet be handled like a camcorder.

Field photo printing

Polaroid and Fuji are putting up devices that are about “print-and-share” photo-printing. The former example is the previously-mentioned Socialmatic camera which has a Zink printer which mimics the classic experience with the Polaroid instant-picture cameras. It has even been styled in a way to evoke memories of their OneStep / 1000 series of entry-level instant-picture cameras with the white front and the rainbow detail under the lens.

Fuji have provided the Instax printer which uses a Wi-Fi link to print to 2”x3” instant-print film. This may be considered more as a toy or “quick-print” device to snap at Polaroid’s solution.

Gaming

The games market has been effectively controlled by the XBox One and PlayStation 4 consoles with casual and small-time gaming taking place on the mobile platforms.

But the main activity that has been occurring at this year’s CES is Valve launching the SteamBox gaming platform with many PC-based gaming names launching their “Steam Machines”. These are computer systems that work to Intel-based microarchitecture but run Valve’s “Steam OS” games operating system rather than Windows. They also work on the cloud-driven games distribution and gameplay model that Valve championed with their Steam concept. There is even the Digital Storm Bolt 2 which is a gaming computer which boots either to Windows 8 or the SteamOS gaming operating system.

NVIDIA also built up the Shield handheld-gaming concept which allows games on the PC or a GRID server to be played on a “PlayAnywhere” handheld.

These are about furthering a concept of streaming gameplay to a local display and control surface or using “download-to-play” setups to allow portable gameplay using the home network and the Internet.

Sony is not taking this lying down by launching the PayStation Now platform which allows you to play PS3 games on Android phones or tablets thus keeping the PlayStation name in everyone’s heads.

Conclusion

The next part of the series touches on the trends that are affecting personal computing including mobile computing devices like smartphones and tablets. It will also touch on the newer technologies that are affecting the home network and other small networks.

High-resolution file-based audio–a few gaps need to be filled here

Linn Klimax DS network media preamplifier

Linn Klimax DS network media preamplifier

As I saw in the Australian Audio & AV Show 2011, there has been interest in the idea of high-resolution file-based audio as a way of conveying music that is fit to play on the latest high-end amplifiers and speakers. Equipment like the Naim NDX or Linn DS series of network media players where playing 192khz 24-bit FLAC files was second nature were being exhibited there.

Lately, Sony used the Internationaler Funkaustellung 2013 trade show in Berlin to premiere a series of hard-disk media players and music systems which are about reproducing these digital-audio files, alongside digital-analogue converters and Walkman portable media players that work with the high-resolution audio files.

Some of the recordings available in this form are either copies of the high-grade studio masters associated with new recordings or remastering efforts of classic recordings like Miles Davis’s “Kind Of Blue” or Pink Floyd’s “Dark Side Of The Moon” where the reference recording was the classic open-reel mono or stereo tape or PCM-701ES / PCM-1630 videotape (a digital recording made using a PCM adaptor and videocassette recorder) that the recording studio turned out as a master. It is an attempt to raise the standard of high-grade audio recording and reproduction above what was acceptable in the late 70s and early 80s.

Typically these files are delivered as WAV waveform files or losslessly-compressed files to the FLAC or ALAC standards. In some cases, efficient lossy formats like WMA or AAC may be used for this kind of recording. The specifications for most of these “master-grade” recordings are stereo or, in a few cases, multichannel 24-bit files with 88.2, 96 or 192 khz sampling frequency.

Downsampling and conversion for less-capable equipment

Some of the setups that I saw were based on a DLNA-based home network but the problem with most of the media servers out there is that they could only work reliably with equipment that provided inherent support for the FLAC, ALAC or similar files at the high sampling frequencies. This would typically be relegated to the high-grade equipment that would serve the main lounge area and is part and parcel of the functionality offered by most network-capable home stereo systems but there is the reality that you may use cheaper equipment for casual listening such as in the kitchen, bedroom or den.

One main feature that I would like to see would be to have DLNA media servers which are supplied with network-attached-storage units support downsampling to “CD-grade” quality for the cheaper equipment such as most of the network speakers. This could be to make available a stream that is a 16-bit 44.1khz or 48khz PCM or MP3 format for this equipment. These streams are exposed and discovered according to UPnP AV standards in order to provide best-case listening according to the equipment’s capabilities.

It is something that is part of the TwonkyMedia Server software but not all NAS devices implement the software or carry through this functionality even though were as seeing a lot of these devices have the processing power of an 2009-era netbook.

As well, if these servers offer DLNA-assisted “syncing” of music files to automotive or portable devices, they could perform the downsampling to this grade during the file transfer process if the user so wishes.  This is more so as these devices become part of the home network when it comes to handling digital content.

WAV and similar PCM-grade files to carry metadata

As for the PCM-grade WAV file which is a common carrier for linear PCM audio, this doesn’t support any metadata in its current form. Of course, this format is highly cherished by people who value high-quality sound reproduction but you work around this either with a file-folder structure that represents your content or a sidecar file which carries the full metadata.

This could be helped through the implementation of the ID3v2 in-file-metadata standard for WAV and similar PCM files. Here, you avoid the need to kludge with folder structures and don’t need to reinvent the wheel when it comes to recording and replaying WAV files.

Timecode and synchronisation issues for prosumer video

The high-resolution audio file formats will be of interest to serious video hobbyists and people who make money from film or video projects. Here, recording equipment that exploits these formats will need to work with standard SMPTE time-code data in the files along with exchanging the timecode through a small network including a Wi-Fi Direct segment.

This is important as we see the “prosumer” photography and video equipment that is valued by the hobbyists, the small-time wedding / corporate videographers and community TV groups become increasingly equipped with WI-Fi networking abilities. Additionally some of the video projects encountered by these people like weddings are anchored around musically-rich content such as live music performances, religious services or reception dances and the high-resolution audio files could do justice to this music.

This has to be easy to implement for the serious video hobbyist or small-time operator who is starting to get to grips with the concept. For example, an audio-recording device connected to a mixing desk to record a presentation or wedding could serve as a time-code master while two or more cameras with on-camera audio are used to capture video but referring to that time-code signal as their time-code.

Conclusion

As we see serious hi-fi buffs, people involved with the recording and reproduction of music and video content, along with musicians and music historians become aware of these high-grade file formats for sound data, the issue of backwards compatibility and searchability of content on the network domain will become real as these formats evolve.