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.

17 thoughts on “Just A Few Things On A Saturday…

  • March 14, 2015 at 7:01 pm
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    Hi Mark, was wondering if there was any way that your seminar could be video taped or captured so that we that are not able to attend could also be informed by you discussion that would be great.

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    • March 15, 2015 at 10:45 am
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      I will try to document the event in some ways but it will last 5 hours or more and that makes it difficult to provide.

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  • March 15, 2015 at 3:07 am
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    Hi Mark,
    you did write:
    ‘JAS requirements for high-resolution audio…meaning 40 kHz/24-bits from end to end.’
    40/24 – was that a typo?

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  • March 15, 2015 at 11:23 am
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    I would hope you provide comparisons of your music with different bit rates to determine whether or not HI-Rez is worth it. I find it hard to justify the added 80% price increase for Hi-Rez files from various sites where my ears can not really tell that much of a difference. I rather pay 20 bucks a month for 25 million tunes to Tidal.

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    • March 15, 2015 at 11:45 am
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      You’re absolutely right, it’s not worth the extra money if they are the same files as you can get on CD. And virtually 99.99% of every download you purchase are CD rips.

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      • March 16, 2015 at 4:22 am
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        Mark,
        With all due respect, I think you are missing my point. I know Tidal has CD rips and I know most music downloaded are just CD rips, I just cannot really tell the difference between the same tracks on Tidal and the Hi-Rez downloads at higher bit rates from HDtracks, It would be worthwhile if you provided a CD bit rate version along with your HI-Rez files to see if your audience can hear the difference on your equipment.

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        • March 16, 2015 at 4:34 pm
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          I’m not going to offer CD resolution versions of all of the tracks on iTrax…that’s way too much effort. But I have done what you ask on some files on the FTP site. You can experience CD res and HD res on the same high-resolution source. Check out “Mosaic” by Laurence Juber that way.

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  • March 15, 2015 at 12:57 pm
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    I will be there on Saturday. I look forward to hearing your room Mark. Should be fun!

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    • March 16, 2015 at 4:31 pm
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      Bring some drinks Joe…it’s going to be a great time.

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  • March 15, 2015 at 7:25 pm
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    Hi Mark,
    In checking I see the Revel Salon 2 speakers run at 86.4 db efficiency. In the light of this and your comment bunch of AHB2 Benchmark amplifiers. Are you planning to run two AHB2 amplifiers per main speaker minimum so four on a stereo setup. As it would seem going by some audio reviews these speakers require power well beyond one AHB2 per speaker let alone one per pair. I recognise these are retail speakers and can be added to with rears and centre. I thought you were going for the JBL M2 Monitors?

    Robert

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    • March 16, 2015 at 4:32 pm
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      I’ve been talking to my friends at Benchmark and yes, we’ll be double amping the system. The M2 were just not available.

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  • March 15, 2015 at 8:47 pm
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    Hi Mark,

    Congrats on the Revel Salon 2 speakers! It sounds like you’re gonna have the best sounding rig at Axpona, and I would certainly like to hear it. I’m pretty sure you have considered a bi-Amped configuration, but I don’t understand how that’s gonna work with the three Benchmark DAC2 converters. I won’t make it to the show, but I would love to see some nice pics on the rear of the setup to get a glimpse of the connections and how you set up the system.

    Are you also going to have headphone rigs that can deliver HRA?

    Best of lucks with the show, you have certainly gone all the way to make a REAL HD-AUDIO presentation.

    Cheers!

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  • March 16, 2015 at 5:09 am
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    Mark, I would really appreciate hearing more about the specially modified Oppo BDP-95 which allows digital output of 96 kHz/24-bit PCM audio into three external DACs. I stream 96/24 multichannel material to my standard Oppo BDP-95 from which I can route the front (stereo) channels (presumably still in 96/24?) to my high-end external DAC, but for the other channels I am limited to using the Oppo’s internal DACs and their resultant analogue outputs. Is your modification generally available? Would you mind letting me know the supplier/modifier as I would like to get mine modified – although it lives with me in Australia.

    Reply
    • March 16, 2015 at 4:35 pm
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      I spoke with them today…and I should be able to give some additional information soon. It’s something that’s being done custom by Oppo and won’t be available to customers.

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  • March 16, 2015 at 6:46 am
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    “We’ll have 96 kHz/24-bit PCM audio coming digitally out of a specially modified Oppo deck into three of the latest Benchmark DACs (the DAC2 HGC) and then through a bunch of AHB2 Amplifiers on to the Revel Salon 2 speakers”

    I demand to see pics of this Oppo abomination.. LOL.. sound interesting..

    Reply
    • March 16, 2015 at 4:35 pm
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      I’ll take lots of photos.

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  • March 16, 2015 at 10:26 pm
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    Mark, I am so looking forward to seeing you at AXPONA. Really tried to make it last year but failed. I am planning on being there on Friday since my grandson’s birthday party is Saturday.

    Should be a great time for all.

    Reply

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