Dr. AIX

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.

9 thoughts on “First MQA-Compatible DAC from Meridian

  • December 10, 2014 at 6:03 pm
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    I believe you’ll find that the Benchmark DAC, as well as virtually every other modern DAC, is upsampling the signal.

    Reply
    • December 11, 2014 at 12:22 pm
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      I’ll ask John Siau, the designer of the DAC2, whether the incoming digital stream is upsampled and let you know.

      Reply
  • December 10, 2014 at 7:05 pm
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    In response to your 12-10-2014 post ” I know audiophiles that won’t go near FLAC files because they worry about the “sonic degradation” of the FLAC codec.”

    FLAC and ALAC are bit-for-bit binary identical to pcm uncompressed. Coming from you, Mark, Waldrep, this posting is ludicrous. I am an audio engineer with 30+ years experience and have 8 US Patents issued in audio related technology. Please keep the integrity in your postings. Thank you.

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    • December 11, 2014 at 12:23 pm
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      Jim…I’m with you on this. Read the pieces in The Absolute Sound magazine that offer a contrary view. I simply said that I know people that believe it….not that I do.

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  • December 10, 2014 at 8:09 pm
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    Apple is the Big Winner for two reasons:

    1. Encapsulating “mastered for iTunes” 96 kHz files and selling them for audiophile purposes, whether in streaming mode or as downloads.
    2. Placing a converter within the Beats headphones for wireless high-fidelity and space saving in iPhones.

    Everyone wins for MQA streaming. Bluetooth/ApX will allow current tech to deliver MQA wirelessly.

    Reply
    • December 11, 2014 at 12:24 pm
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      We’ll see. It would be a big win for Meridian for sure.

      Reply
  • December 10, 2014 at 8:20 pm
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    Hello Mark,
    I read this today morning. Promates: The World’s First DXD Download Store http://www.stereophile.com/content/promates-worlds-first-dxd-download-store

    The question is now which new format will win the race. Both promoters claim that their codec sounds superior. Not many were able to hear a DXD file. MQA nobody has heard.
    At the moment DXD is a bit ahead. Almost every new DAC that was launched in the last two years or so is DXD capable. And there are now 25 files (imagine 25!) from Promates available plus a few more from 2L.

    But one thing is clear for me. DSD has no chance anymore to become a format that can exist besides PCM (incl. DXD) and MQA.

    Reply
  • December 10, 2014 at 9:28 pm
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    Stick’em up partner. Either pay up for the decoder or your encoded HD files will be down sampled to CD spec.
    No thanks, I’ll pass
    And just a day or so back we were writing about the resistance to HD in the marketplace do to cost. Now they want to hold us up for decoding equipment as cost of entry.

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    • December 11, 2014 at 12:35 pm
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      Not exactly Sal. The MQA initiative is meant to allow streaming of analog masters transfers in a smaller footprint. Those with the decoders will be able to get the quality of the 192 kHz/24-bit transfers faster and smaller. If you don’t have the decoder, the file isn’t downsampled to a CD (after all the analog tape original has less fidelity than the CD)…it merely remains at the spec of the original file, whatever that was.

      Reply

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