Dr. AIX's POSTSHighResAudio

The New Sony High-End HD Audio Machine

The recent flurry of announcements from the CEA and Sony regarding the new HRA initiative is welcome news. We’re going to have a holiday season of machines capable of exceeding the resolution standard CDs. Here’s the low down on the top-of-the-line hardware that Sony will be pushing this Christmas.

There are two “HDD Audio Players” (the HDD stands for Hard Disk Drive). The first is their tap-of-the-line player with a 500 GB hard drive and built-in amplifier. It supports DSD at both 64 and 128 times 44.1 kHz and the full range of PCM High Definition formats at virtually all of the sample rates (44.1 kHz – 192 kHz) and word lengths (16-24-32-bits). The device also supports WAV, AIFF, FLAC, ALAC, ATRAC Advanced Lossless, ATRAC, MP3, AAC and WMA music file formats. There are not very many files other than a DXD or 384 kHz PCM file that you can’t play on this machine. Bravo!

The HAP-S1/B has a 500 GB internal hard drive for music storage, which should be more than enough to accommodate your catalog of high definition audio files. Those files will be downloaded directly to the device via a WiFi network connection (built-in) or be accessed from external USB drives or memory. The unit comes with a dedicated application for transferring music from your PC or Mac. You simply select your music library and the HAP-S1/B will bring the files to its local storage.

Running the unit happens from the front panel OR through “HDD Audio Remote” for iOS and Android phones and tablets. That means that you can site across the room and drive the player. The graphics and navigation controls will be accessed from the tablet or phone. Very cool. The days of getting up to swap a disc or switch to a different soundfile are behind us.

The good folks at Sony are hoping that DSD because as ubiquitous as HD PCM files. The DAC in the HAP-S1/B includes a LPF (Low Pass Filter) to “effectively remove” the high-frequency noise in DSD signals (I applaud their honesty and openness on this issue). They employ four FIR (Finite Impulse Response) digital filters per channel for very accurate clocking. FIR filters are ideal for D/A conversion of DSD signals.

There are plenty of cool electronics to appeal to the audiophile geek in all of us. Heavy-duty capacitors, single point ground structure, a custom designed transformer and a solid chassis contribute to optimal playback specifications. You can count on getting excellent sound from the unit…depending, of course, on what you play back on it.

One of my readers wrote to me asking me whether the HAP-S1/B supports 5.1 or 7.1 surround music playback. Sadly it doesn’t. By looking at the photograph of the back of the unit and reading the specifications tab on the product web page, it’s clear that this is a “traditional” audiophile piece…meaning their is not support for surround music playback.

To say I’m disappointed in this missing feature would be putting it mildly. The perceived difference between a 5.1 track vs. a stereo mix AND a standard definition audio track vs. most “high-resolution tracks” is dramatic. There’s no chance that someone will miss the fact that a surround music presentation is more immersive (taste is another thing) than a stereo mix. But play a great CD for someone and then a HD-Audio file and there’s a fair to good chance that the listener won’t be able to tell the difference.


Mark Waldrep, aka Dr. AIX, has been producing and engineering music for over 40 years. He learned electronics as a teenager from his HAM radio father while learning to play the guitar. Mark received the first doctorate in music composition from UCLA in 1986 for a "binaural" electronic music composition. Other advanced degrees include an MS in computer science, an MFA/MA in music, BM in music and a BA in art. As an engineer and producer, Mark has worked on projects for the Rolling Stones, 311, Tool, KISS, Blink 182, Blues Traveler, Britney Spears, the San Francisco Symphony, The Dover Quartet, Willie Nelson, Paul Williams, The Allman Brothers, Bad Company and many more. Dr. Waldrep has been an innovator when it comes to multimedia and music. He created the first enhanced CDs in the 90s, the first DVD-Videos released in the U.S., the first web-connected DVD, the first DVD-Audio title, the first music Blu-ray disc and the first 3D Music Album. Additionally, he launched the first High Definition Music Download site in 2007 called iTrax.com. A frequency speaker at audio events, author of numerous articles, Dr. Waldrep is currently writing a book on the production and reproduction of high-end music called, "High-End Audio: A Practical Guide to Production and Playback". The book should be completed in the fall of 2013.

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