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Thread: USB soundcard eliminat distortion??

  1. #1
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    Post USB soundcard eliminat distortion??

    I have a USB cable that connects to a Sound card that changes the signal from didigtal to analog (single RCA). That is all it does because it is used to record Mnindisc. Can anyone tell me if the USB eliminates any engine noise and computer innterferance ect?? i think that is one of the main reasons it is sold to record MDS. If it does it would eliminate the engine noise and AC/DC inverter problem!

  2. #2
    Retired Admin Aaron Cake's Avatar
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    Cool

    It may eliminate those problems, but then it may not. I don't think anyone here has ever used one.

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  3. #3
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    I have an I-Opener and really didn't have the soldering skills to do the audio out mod on it so I too went to the USB audio DAC route for my mp3car. I purchased a DAC from I dont remember who, but the sound quality was horrible and I couldn't get rid of the engine noise no matter what I tried. This was a little tan box shaped DAC with like a 4 inch USB cable. I found out that there was a huge need for these DACs among I-Opener people and no one in the states had them in stock so I talked to my Dad who knew of a Taiwan supplier who sells them and I made a bulk purchase from them (50 units). I found that these units worked beautifully and produced no engine noise at all. There is a slight bit of distortion at high levels though. But nothing that is too annoying. I have a few left over if you are interested in getting one, I can ship one out to you for $30 over paypal. They have 2 stereo channels out and can easily be taken out of the packaging to make your case smaller, I hid mine inside the I-Opener case which has almost no extra room.
    Hope to hear from you soon, if you have any other questions dont hesitate to ask.

    topperge
    topperge at msu dot edu

  4. #4
    FLAC DodgeCummins's Avatar
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    I don't know if this is what you are talking about, but I bought a pair of Labtec USB speakers (1040) I pulled the USB guts out, and put a couple of RCA cables on it, I use that now and will continue to use it, I get fantastic results.

    Also the speakers still work...

    The only noise I got was when I ran the RCA cord to close to my CB radio antenna and started getting feedback whenever I transmitted.

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  5. #5
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    sounds groovy. I figured the USB cord would elimnate any distortion or noise a RCA would pick up along the way cause it's all data/digital info until it gets the the tiny AN1 at the end that sends it to the RCA. I was gonna get a USB extension and then go from the computer to the dash and then put the AN1 (small box that converts signal to RCA) right behind the stereo in dash and the 4 inch RCA into the headunit,.

  6. #6
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    I had one in my car...an actual USB -> 1/8" plug since I couldn't fit a sound card in my pc at the time.

    Then later, I was able to add the M-Audio 24/96 Sound Card w/ RCA outputs.I use an inverter and that card. There is absolutely no noise in this system. Plus it's going to be connected digitally through my HU. I have to use inverters though..no choice for me.

    Anyway, the USB sound adapter worked for me when I had it in there. I didn't hear any noise whatsoever.

    [This message has been edited by Dragyn (edited 02-25-2001).]

  7. #7
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    Thanx for the info.
    But Dragyn, just a FYI, If your sound is outputed through RCA's to ur headunit then the signal is not digital it's analog. The only way it could be digital is if it were going through a TOSlink Plug to the headunit. But I dont know of any H/U's that even support digital input yet.

  8. #8
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    Question

    Hey Topperge... can I buy one of those USB sound modules off of ya? I emailed you but I didn't get any response....

    thanks


    <font face="Verdana, Arial" size="2">Originally posted by topperge:
    I have an I-Opener and really didn't have the soldering skills to do the audio out mod on it so I too went to the USB audio DAC route for my mp3car. I purchased a DAC from I dont remember who, but the sound quality was horrible and I couldn't get rid of the engine noise no matter what I tried. This was a little tan box shaped DAC with like a 4 inch USB cable. I found out that there was a huge need for these DACs among I-Opener people and no one in the states had them in stock so I talked to my Dad who knew of a Taiwan supplier who sells them and I made a bulk purchase from them (50 units). I found that these units worked beautifully and produced no engine noise at all. There is a slight bit of distortion at high levels though. But nothing that is too annoying. I have a few left over if you are interested in getting one, I can ship one out to you for $30 over paypal. They have 2 stereo channels out and can easily be taken out of the packaging to make your case smaller, I hid mine inside the I-Opener case which has almost no extra room.
    Hope to hear from you soon, if you have any other questions dont hesitate to ask.

    topperge
    topperge at msu dot edu
    </font>
    Free entrance to heaven? WOW! I DUN BELIEVE! JC!

  9. #9
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    <font face="Verdana, Arial" size="2">Originally posted by HunterC4:
    If your sound is outputed through RCA's to ur headunit then the signal is not digital it's analog. The only way it could be digital is if it were going through a TOSlink Plug to the headunit. But I dont know of any H/U's that even support digital input yet.</font>
    Well my HU is the Clarion DVS9755z (DVD) that has digital in. The sound card I'm using has digital in and out also with analog out. They are all RCA type connects.

    As of now, it's connected analog. Sounds really good. I'm trying to get it connected digitally.

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    [This message has been edited by Dragyn (edited 02-25-2001).]

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