M-Audio M-Track Quad Monitor Out only plays on one speaker

I'm using an M-Track quad with M-Audio studio monitors connected to the rear 1/4" output. Only the left channel works, the right channel is silent.

I have the toggle switch on the front set to "Stereo" but I also tried "Mono" and got the same result.

I get the same result from the second 1/4" output on the back, so I don't think it is just one defective port.

When I plug the monitors into the front headphone port I get full stereo audio in both speakers, using the same cable.

Are these rear outputs single channel only? How can I get both monitors working without using the headphone port?
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  • Hi,
    You will need to use both output jacks at the same time to get stereo. They are all Mono outputs for their respective side, and must be used together to get Left and Right stereo pairs. 1+2, and 3+4.

    If your monitors have a 1/4" TRS jack plug, you'll have to find a solution to meet the correct connection needs. Something like a 1/4" TRS female to 2x 1/4" TS Male stereo-2x mono cable should do it.

    Like this


    Kind regards
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  • Thanks for the super fast reply @16bit

    So if I use Output 1 and 2 to L&R of my monitors I will get stereo playback from USB?
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  • Yeah, exactly. You need to run Output 1 to your Left amp input/speaker and Output 2 to the Right.

    That's the basic setup, where you can play audio from within your OS, as well as monitor any or all of the signal from the analogue inputs.

    The Quad also has Output 3 and 4 (Left mono and Right mono) which are for software playback only (no input monitoring), and would be accessed by multichannel aware software like most DAWs, but not the OS or most stereo audio players.
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  • hi 16bit, i just got am M-track Quad. it wont play back at all. both the out put and the head phone port. it records fine but with cracks. what can i do? can you send me a detailed picture of how you did yours? or can you send me a video.am tired. contacted the technical guys they didnt respond.
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  • Hi Folarin,
    I don't actually own the M-Audio Quad device, I just have a pretty good idea how it works. So, unfortunately no video.

    Here's a signal flow diagram I created:
    http://community.m-audio.com/m-audio/...
    **Moderators, can we get this thread out of archive status please, it's still relevant and could be helpful.**

    M-Track Quad signal flow

    So, if you wanted to just play something back, you'd need to turn the Monitor/Mix knob to the Mix side to get the playback signal of 1/2.
    Or if you wanted to hear incoming analogue input into the front jacks, then turn the know towards Monitor.

    Set the headphone selector to "1/2" or "All" for now, as this should allow the default sounds and any inputs to come through.

    A few questions...
    What OS are you using?
    What DAW (recording program) are you using?
    What buffer setting is your recording software reporting for the Quad?
    Are you using a USB2.0 port or USB3.0 (or worse, a hub?)

    I can try and see what I can think of to help out.

    I'd give the tech support a few days to reply, we are in Easter now, so Good Friday is a bank holiday, at least in UK. Chances are there won't be staff about until Tuesday, as Monday is a bank holiday too.

    Best regards
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  • Thanks a lot, the DAW is sound forge.

    My OS is windows 7, I don't understand what you mean by USB port. I just used the usb cable that comes with the sound card that's all. Do i need another cable it do I need to set The USB to 3.0 on my computer? What's the best buffer setting I need to use?

    Thanks a lot for your prompt reply
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