Even more Beatles remasters news

In addition to The Beatles remasters being released on CD in mono and stereo versions Mojo recently broke the inevitable news that they will also see a vinyl release as well. Thus far there is no news on pricing, stereo and/or mono, or whether they will be sourced from the 24/192 digital masters or analog masters. But it's good news for record lovers everywhere. For those on the complete other end of the spectrum the catalog will also see release on a USB drive according to Reuters news agency, just in time for Christmas of course. Apparently, the release will be limited to 30,000 units. Probably in much the same way that the mono boxed set was "limited" to 10,000 units. In addition to the 320 Kbps MP3 files the drive will also contain the albums in FLAC at 24 bits 44.1 Khz. It's good to see that they are offering people something at higher resolutions than MP3. Now the only question is when will they release the music in 24/192 (possibly on Blu-Ray) because we ALL know that it's coming sooner or later.

Audio over USB

The arrivals of the iPod, iPhone, Airport Express and Apple TV have raised the bar of consumer expectations of convenience when it comes accessing their music collection. With hard drives being as cheap as they are and so many new DACs coming equipped with USB inputs putting together a DIY music server seems like a better and better idea every days. However, like many things in high end audio it's not as simple as it first seems. At least two major factors stand between the interested audiophiles and good sound.

1. Jitter: In essence all of the "1" and "0" are present and in the correct order but the word clock that tells the DAC when to decode them is wrong. We're talking about fractions of a second here but our ears do pick up on it. Think of it this way. The world's best marching band all taking their time from a drummer with great rhythm vs. that same marching band with someone with no rhythmic sensibility. The musicians haven't changed, their instruments haven't changed, and the sheet music is still the same. But the rhythm won't be the same and things will start to sound sloppy and lax. Many of the new digital to analog converters are built specifically to reject incoming jitter are based on the Burr Brown PCM270x chips. That chip set has two major limitations. First it has a strong jitter component at 1kHz, which as misfortune would have it is smack in the audio band AND the frequency at which the human ear is MOST sensitive. Second, the chip is limited to a maximum sampling frequency of 48kHz which excludes it's use to transfer high resolution 88.2 kHz, 96kHz, and 192 kHz content. A better solution is a DAC capable of exploiting USB's asynchronous mode where the DAC requests the data when it is needed and therefore determining it's own word clock. Curently very few DACs on the market are capable of properly implimenting the asychronous mode because of the coplexity of the computer code necessary to make it work properly. Gordon Raskin, whose first career was in the computer world is one of the few people on the planet with a good understanding of bother sides of the problem. Currently his custom code is available in products from his company, Wavelength Audio and the upcoming QB-9 from Ayre.
2. Re-sampling: CD's are at a sampling rate of 44.1kHz which means that every second is broken up into 44,100 slices with each slice being described by a series of 16 "1" and "0." Microsoft in their infinite wisdom decided that most of their products translate everything to 48kHz or 48,000 by adding essentially garbage in a part of the program called the "K Mixer." According to the Wavelength web page the "K" mixer can be by-passed or mapped through as it's called (proceed at your own risk) by the following steps. "Go Control Panel => Sounds and Audio Device => Select Hardware Tab => Select USB Audio Device.
   
   Click Properties Button => Select Properties Tab => Click the “+” to the left of [+] Audio Devices that will pop down USB Audio Devices.
   Select USB Audio Devices and click Properties.
   
   Check both Use audio features of this device and Do not map through this device.
   ==> [ Apply ] <=="

Revolutions In Sound: Warner Bros. Records Launches 50th Anniversary Celebration

Boxed sets are so much more than just the music that they contain. They are testaments of passion and respect reserved for historically important topics. The 240 page book contains many exclusive photos and interviews. Warner Bros. has released two versions of this collection. One version of the boxed set contains a USB drive in the shape of the Warner Bros. logo and contains 320 songs. It is not immediately obvious what file format or resolution has been used to encode these files. The other version contains 10 CDs which have 199 songs. Would it have killed them to have shoe-horned in one more song?

DIY music server

Recently I've been thinking a lot about building my own music server. With my recent purchase of a Hitachi H31000U 1 TB hard drive for the bargain price of $199 , I'm one step closer. This weekend I tried the PS Audio Digital Link III DAC which has a USB digital input. The PS Audio offers the ability to upsample the digital data to 96kHz or 192kHz. When upsampling the USB input to 192 kHz every couple of minutes there was a strange occurrence. There was a temporary drop in volume and a very slight interruption of the music, which lasted fractions of a second. Switching the unit to 96kHz solved this issue but also didn't offer quite the same sound quality.

A shootout between the PS audio and my current DAC, the Theta DSP Pro Basic III ended with the Theta coming out on top. So now the HagUsb from Hagerman Tehnology looks will be how I get my current DAC digital information from my future server project. At between $119 to $139 depending on whether one chooses the SPIDF or the AES/EBU, it seems like a bargain. Add to the affordable price a 30 trial period is it seems like a great opportunity. Of course the ideal solution would be a sound card that would have a digital output, however nearly all of those are toslink which is unacceptable for high end applications.

My current vision for the finished music server would be using a Windows XP based PC using iTunes playing WAV files. Apple lossless probably won't be used because even though the files are smaller and there is a mountain of evidence that they have the exact same data as a WAV file after being uncompressed it is a proprietary. If I change to other programs or buy a server a couple of years from now I don't want to have to re burn my music collection. Foobar2000 as an organizational interface also seems popular some more research into that might be warranted. Many use Exact Audio Copy to import music so some reading on that is also probably in order.
Getting better sound from a computer running Windows XP using iTunes is easier than you think. The following changes in total caused a profound increase in sound quality of the 1/8th inch analog out jack of my lap top. Windows XP Setting changes:

After right clicking on the volume control in the tool bar make sure that the “wave” volume control is at maximum and that the balance is in the middle. Both setting are implemented in the digital domain degrade the sound if used. Volume is reduced by reducing the resolution. 1bit of resolution is lost for every 6db of attenuation applied with a digital volume control. Also make sure that you press the advanced button and un click the “1 mic boost” setting. It raised the noise floor dramatically. Going into the “Sound Effect Manage” via the control pannel and making sure that there isn’t any EQ being done there is also advisable. On the “S/PDIF-Out” tab change the sampling rate from 48KHz to 44.1KHz. The bit conversion done by this setting when it is at the 48KHz setting destroys the sense of space as well as reducing tonality in the bass and destroying micro dynamics.

To stop windows sounds from interrupting the music go to the control panel select “Sound and Audio Devices” then to the “Sounds” tab. Under “Sound schemes select “No Sounds” and press the “Apply” and “Ok” buttons.

Changes in iTunes:

If iTunes is the player that will be used to interface with the music library make sure to turn the “Sound Enhancer” and “Sound Check” features off. “Sound Enhancer” boosts the high frequencies and also exaggerates left/right separation. Thus if we want a true representation of the audio this box should be unchecked. The “Sound Enhancer” does nothing more than add dynamic compression in an attempt to reduce the volume difference between songs when in random mode. It goes without saying that compressing dynamics changes the sound and is therefore inherently less accurate, hence undesirable. To turn these features off go to the “Edit” tab, select “Preferences”, then the “Playback tab and make sure that both the “Sound Enhancer” and “Sound Check” boxes are not checked. Also make sure that the volume on iTunes is set to it’s maximum setting because again this is another digital volume control that reduces volume by reducing resolution.