# Multi channel audio output using audio interface

**URL:** https://discourse.processing.org/t/multi-channel-audio-output-using-audio-interface/35276
**Category:** Libraries
**Created:** [February 18, 2022, 8:42pm UTC](https://discourse.processing.org/t/multi-channel-audio-output-using-audio-interface/35276 "2022-02-18T20:42:48Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![GSA\_IxD](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/gsa_ixd/32/7554_2.png) [@GSA\_IxD](https://discourse.processing.org/u/GSA_IxD)
#### Post date: [February 18, 2022, 8:42pm UTC](https://discourse.processing.org/t/multi-channel-audio-output-using-audio-interface/35276/1 "2022-02-18T20:42:48Z")

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Hi – appreciate there are a couple of similar questions on this but couldn’t get a resolution that works for playing samples. Wondering if it’s just not possible so any steer appreciated.

I am trying to build a simple 6 channel non-linear audio system in Processing. I use MacOS and a nice [MOTU Mk5 audio interface](https://motu.com/en-us/products/gen5/ultralite-mk5/) which has 10 analogue audio outputs. I connect 1-6 to 6 separate powered monitors. I am looking to send a sound to play on a specific channel. I can see the interface and separate mono channels in software like Audition and all works well from there – great for linear soundscapes. But I’d like to randomly trigger and control sounds to create a non-linear sound installation framework. I’m confused as to how I set up either the Sound or Minim library – tried various implementations but no luck.  
`Sound.list()`  
returns a list of outputs and IDs and a count of inputs and outputs for every device eg.

device id 6: MOTU Mk5  
max inputs : 18  
max outputs: 22

So I can set the audio interface up as the output but don’t know how to address a specific output.

It’s possible it’s not do-able. Just looking for any experience or feedback to confirm. Thanks!

[update: I can successfully send synth sounds out of separate outputs on the MOTU using info from [this very helpful post](https://discourse.processing.org/t/multi-output-audio-interface/34873/4). Now trying to work out how to play samples