# Motu M4 Audio 4 channel setup

**URL:** <https://discourse.processing.org/t/motu-m4-audio-4-channel-setup/48446>\
**Category:** Libraries\
**Created:** [April 18, 2026, 1:09pm UTC](https://discourse.processing.org/t/motu-m4-audio-4-channel-setup/48446 "2026-04-18T13:09:52Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![TomC](https://avatars.discourse-cdn.com/v4/letter/t/8dc957/32.png) [@TomC](https://discourse.processing.org/u/TomC)\
**Post date:** [April 18, 2026, 1:09pm UTC](https://discourse.processing.org/t/motu-m4-audio-4-channel-setup/48446/1 "2026-04-18T13:09:52Z")

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Hello:

I have a Motu M4 connected to a Win11 machine.

I would like to have independent control of 4 oscillators/sound sources.

There seems to be a limitation that windows will only allow 2 channels of audio I/O.

Is there a simple way to configure and use 4 independent audio I/O channels?

Thank you,

TomC

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<div class="post-metadata">

**Author:** ![glv](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/glv/32/18785_2.png) [@glv](https://discourse.processing.org/u/glv)\
**Post date:** [April 18, 2026, 8:51pm UTC](https://discourse.processing.org/t/motu-m4-audio-4-channel-setup/48446/2 "2026-04-18T20:51:05Z")

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Hello @TomC,

Take a look at this example:

_[processing-sound/examples/IO/MultiChannelOutput/MultiChannelOutput.pde at main · processing/processing-sound · GitHub](https://github.com/processing/processing-sound/blob/main/examples/IO/MultiChannelOutput/MultiChannelOutput.pde)_

It states:

> // some multi-channel USB audio interfaces don’t show the correct number of  
> // output channels using the default audio drivers on Windows. If this is the  
> // case, try loading PortAudio support at the very top of your sketch with the  
> // following command (see the LowLevelEngine example for details):
> 
> // MultiChannel.usePortAudio();

`:)`