Cant record channels 2 and 3 in mixer only channel 1

Hi I am operating on Windows 7 with audacity 2.1.2 on an exe install.
I am able to record from my mixer, pioneer DJm 900 Nexus on channel 1 only. There is no wave when trying to record channels two and three. My input is set to line in pioneer DJm 900, two stereo recording out and I can hear everything through my speakers. Just wondering if this is a setting or if I have missed something in the routing somewhere? I had audacity up and running a month ago no problems this just occurred .

I would really appreciate your help and thanks so much and advance

How did you connect your computer? Many machines only have pink Mic-In which is mono.

You can set Audacity for stereo in the Device Toolbar.

And you can also get stuck with mono in Windows. Set that in Windows Control Panels.


Hi koz thanks for the info but it did not solve the issue. First my apologies I’m on Windows 8.

I followed all instructions to make sure I’m in Stereo not Mono on computer and in audacity. As the instructions suggested, I was unable to locate “multi channels” in the recording drop down -only mono or stereo. I also tried all options from the audio host drop down.

Pls help! Thanks a lot

DJm 900 Nexus is a stereo dance mixer. Where are you getting three channels from? Can I assume you connected the USB from the mixer to the computer?

Oh, I get it. It’s a 4 channel mixer assuming you’re using the appropriate driver and software packages. It doesn’t “look like” a stereo mixer, or anything else on its own. So it’s between you, Windows and Nexus.

Screen Shot 2016-01-14 at 11.25.08.png

That is what I would expect unless the drivers/firmware Koz mentions solves the problem. If it doesn’t and the mixer sends 4 channels over USB for recording, then all you will get in Audacity is mono or stereo, but choice of channels 1/2 and 3/4 as separate mono/stereo devices.

You are using the USB cable, right?


Just a few musings… :unamused:

There is something odd in the way Audacity selects channels. I can’t put my finger on it, but I have a feeling it has to do with numbering.

Most people number 1, 2, 3…

Most programmers number 0, 1, 2…

In interface land, the better ones have stereo channels numbered 1/3, 2/4, 5/7, 6/8…
The first stereo channel uses odd numbers, the second even and so on.

Combine problem 1 with problem 2 and you have at least one disappearing channel.

Also, I think Pioneer might be talking about 4 USB output channels as this would matter far more than 4 record input channels to most DJ’s. I tried looking it up, but that site doesn’t work. I can click their “product segmentation” landing page, but nothing happens. Doesn’t inspire a lot of confidence in drivers, I’m afraid :confused:

Algol programmers used to count 0, 1, 2…

But Fortran programmers count 1, 2, 3… :wink: :ugeek:

I wonder what Google’s programmers use. Go?

I was reading about the ambisonic 4 channel extension to Youtube audio and the channels are numbered 0231 or something like it :astonished: