[chuck-users] Routing stereo sound file to dac channels

Nunn, Douglas Douglas.Nunn at anglia.ac.uk
Mon Feb 18 14:39:09 EST 2019

Hi Scott,

Are you on Windows? Did you specify the -in and -out flags? When I last tested it, the non-ASIO build doesn't support multi-channel audio. Also, the -dac flag needs an extra character before the number.

If you start the ASIO build of ChucK like this, it works.
chuckasio --dac_3 --adc3 --in8 --out8 test.ck

Here, 3 is the audio device number. See http://electro-music.com/forum/topic-69370.htmlhttp://electro-music.com/forum/topic-69370.html

   Hope this helps,


From: chuck-users-bounces at lists.cs.princeton.edu [chuck-users-bounces at lists.cs.princeton.edu] on behalf of Scott Smallwood [ssmallwo at ualberta.ca]
Sent: 18 February 2019 17:45
To: ChucK Users Mailing List
Subject: [chuck-users] Routing stereo sound file to dac channels

Dear chuckians…

This is bizarre… I was sure I have done this in the past, but it isn’t working and now I’m a bit flummoxed…. Any ideas here?

PS:  I’m trying to route channels 0 and 1 of a stereo .wav file to dac channels 2 and 3.  Should be simple.  So why doesn’t this work??

I realize that I could just spit it into mono files… but why?  I thought SndBuf supported up to 8 channels.


SndBuf sb;

//read in stereo sound file
"snd/squeakies/bell_4.wav" => sb.read;

//works - and routes channel 0 of sb to dac.chan(3)
sb.chan(0) => dac.chan(2);

//doesn't work - claims NullPointerException
sb.chan(1) => dac.chan(3);

1::minute => now;


[ - ]  Scott Smallwood<http://www.scott-smallwood.com> - Associate Professor - University of Alberta  [ - ]


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