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Thread: audio over USB v. optical

  1. #21
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    Quote Originally Posted by scott_fx View Post
    hey red,

    you may want to contact Douglas; the guy who built the hpdac that i have. He designed and built that dac/amp with good results. maybe he could steer you the right way
    can you give me his contact info or web page or anything along those lines? A PM or IM would be fine.
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  2. #22
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    Quote Originally Posted by Zip-Lock View Post
    I think audio over USB is only going to get better. Windows Vista promises to do a much better better job of insuring quality with the new new Intel HD Audio Architecture, I think it's the way to go.
    good to know!
    Jan Bennett
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  3. #23
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    Quote Originally Posted by Zip-Lock View Post
    Not really sure, I know there is strict testing to ensure products that bear the new "Designed for Windows" logo meet the UAA design requirements which means that the audio over USB will work correctly unlike some prior sloppy USB over audio implementations.
    How do you think this would affect an external DAC? If all audio processing were to be done on a PC, then just the audio stream would be sent to the DAC, would something like this matter so much? Or is the HD audio chipset designed to improve windows audio in general? Meaning we would have a more true representation of the audio stream as it hits the USB cable?
    Jan Bennett
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  4. #24
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    This sounds like something I would most definitely be interested in. Looks like it's time to look over some schematics for DIY usb DAC's and figure out the best way to add more channels.

  5. #25
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    do you build or no?
    Jan Bennett
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  6. #26
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    Quote Originally Posted by RedGTiVR6 View Post
    can you give me his contact info or web page or anything along those lines? A PM or IM would be fine.
    here is his website
    http://www.ecp.cc/HPDAC.html
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  7. #27
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    thanks!
    Jan Bennett
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  8. #28
    Variable Bitrate proph's Avatar
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    Hey Red,
    Saer will chime in in a sec. He helped me bump the Silverstone DAC from 1v RMS to 3.5vRMS. He's local just so you know, this is exactly what I was talking about at the meet. I'm glad someone else sees the potential.
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  9. #29
    Constant Bitrate
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    ok,

    i have been reading HTPC setups and external DIY DAC builds until i am seeing stars..... so from the last few days of reading...
    build a USB DAC non-oversampling mind you with I2S and tube buffer.... ok then throw in your source material... ripped using foobar or similar bit correct player/ ripper.. so many options.
    it does look like most are pointing to I2S output to remove jitter. but whether its doable in a cost effective manner either usb or PCI is another story.
    maybe build along the lines of turbo's thinking.. a pc for data and frontend and a separate unit (pc case etc) connected via usb with just a powersupply and DAC's with analog output.

    turbo... im not sure of your need for multiple outputs. if its for 5.1 or mutliple channel audio source.. then seems you would have to decode that material which then leaves the DAC out of the picture correct? if its not for multilpe channel source material... then wouldnt the amp passthru work.. as on the alpine amps?
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  10. #30
    Variable Bitrate proph's Avatar
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    So whats your goal here Red? Five 8v output, 1 input? I know others might have something different in mind.
    Setup:
    Dynaudio 240GT
    PPI PC4100, PPI PC2350
    Zapco DSP6
    ADS DAC
    Testing new board (Albatron KI690-AM2)

    "I dont know if complaints were filed, or mistakes were made, but feelings were hurt." -Krystal Washington

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