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Thread: D/A Converters

  1. #1

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    Default D/A Converters

    There was a post about this recently, but I wanted to better understand. I understand that if I use optical audio (or coax) out from DVD to preamp/processor, that the processor does the D/A conversion. And if the DVD audio track is 5.1, it plays 5 channel. If the DVD is connected with RCA analogs to the processor, then the processor's D/A converters are used....BUT do I still get 5 channel sound (i.e., Dolby Digital or DTS)?

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    Analog/RCA/XLR outs=source is doing the conversion
    Digital out (coax/fiber/XLR)=destination is doing the conversion

    EDIT: Fiber=Toslink, AT&T, Optical
    Last edited by steveinaz; 05-01-2007 at 12:46 PM.

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    fiber = optical
    RCA 5 separate channel inputed into AVR and are only 5.1
    Optical and Coax auto define 2 ch,5.1,6.1,and 7.1 and so on.
    engtaz

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    Quote Originally Posted by engtaz View Post
    fiber = optical
    RCA 5 separate channel inputed into AVR and are only 5.1
    Optical and Coax auto define 2 ch,5.1,6.1,and 7.1 and so on.

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    Help define it better for me PLZ HTrookie. I am at work and limited on time.
    engtaz

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    in the olden days when DVD players first came out.. to get dolby digital or DTS you needed 5 analog RCA cables. L,C,R, LR, RR = 5 the .1 is and always will be your subwoofer. a cable would be used from the receiver's sub output to your subs input. giving you bass

    as well all know today you have the option of using only one cable to do the same exact thing.. that being a digital optical or coax cable.. no longer a need for 5.1 RCA cables.

    so it's up to YOU to decided which YOU prefer one digital cable or 6 analog cables. if you use the analog cables, YOUR DVD player does the decoding.. if you use YOUR receiver YOUR receiver does the decoding via digital cable.

    OMG it's not rocket science for pete's sake.

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    Quote Originally Posted by engtaz View Post
    Help define it better for me PLZ HTrookie. I am at work and limited on time.
    I just have no idea of what you are trying to say....so can't help you.

    Steve has it right on.
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    Quote Originally Posted by NeilGabriel View Post
    There was a post about this recently, but I wanted to better understand. I understand that if I use optical audio (or coax) out from DVD to preamp/processor, that the processor does the D/A conversion. And if the DVD audio track is 5.1, it plays 5 channel. If the DVD is connected with RCA analogs to the processor, then the processor's D/A converters are used....BUT do I still get 5 channel sound (i.e., Dolby Digital or DTS)?
    if you use the the rca's on the back of your dvd player it is not using the receiver's/pre-pro's dac it's using the one in the dvd player. so if you use the stero l/r output you are getting stereo, if you use the 5.1 output(l/r/c/s/ls/rs) you get 5.1(not all dvd players have dedicated 5.1 ouputs)

    I hope that helps

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    Some DVD player have 6 ch outs.
    engtaz

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    Quote Originally Posted by danger boy View Post
    in the olden days when DVD players first came out.. to get dolby digital or DTS you needed 5 analog RCA cables. L,C,R, LR, RR = 5 the .1 is and always will be your subwoofer. a cable would be used from the receiver's sub output to your subs input. giving you bass

    as well all know today you have the option of using only one cable to do the same exact thing.. that being a digital optical or coax cable.. no longer a need for 5.1 RCA cables.

    so it's up to YOU to decided which YOU prefer one digital cable or 6 analog cables. if you use the analog cables, YOUR DVD player does the decoding.. if you use YOUR receiver YOUR receiver does the decoding via digital cable.

    OMG it's not rocket science for pete's sake.
    I agree and understand the above. My question is that if I use the 2 channel RCA outputs on the DVD player, am I only going to get a 2 channel sound. It sounds like the answer is a resounding yes. The processor cannot decode that into a 5 channel sound cause it is not getting 5 channels of information.

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    if you use 2 ch RCA outputs on a DVD player. the DVD player can downmix all channels into 2 channel's.

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    Quote Originally Posted by NeilGabriel View Post
    My question is that if I use the 2 channel RCA outputs on the DVD player, am I only going to get a 2 channel sound. It sounds like the answer is a resounding yes. The processor cannot decode that into a 5 channel sound cause it is not getting 5 channels of information.
    Yes, you are correct. Out of 2-channel RCA out you are getting only 2-channels of information, and the source is doing the DA conversion.

    Transport: Oppo BDP-103/USB HDD (flac)
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    I have my SACD player hooked up coaxial out to a Theta DAC to integrated amp's CD input. I also have the RCA outs hooked up to the integrated amp's AUX input for SACD playback as I don't believe SACD is output through digital (coaxial or optical).

    It works great! Hope I confused someone.
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    Many folk's do that, redbook thru digital---SACD via analog (your only choice).

    Transport: Oppo BDP-103/USB HDD (flac)
    DAC/Preamp: Benchmark DAC/PRE
    Power Amp: Parasound HCA-1500A
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    Cables: Kimber Hero/8TC; DH Labs D-75

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