Hello Matthew,

What does chuck --probe show for your sound card?

   michael


On Jan 30, 2020, at 9:43 AM, Matthew.Noone <Matthew.Noone@ul.ie> wrote:

Hi all,

I am trying to get multichannel output (to four speakers) using ChucK.

I'm running on a Mac and using a Scarlett 18i8.

I've tried running this test code.
SinOsc s0 => dac.chan(0);
SinOsc s1 => dac.chan(1);
SinOsc s2 => dac.chan(2);
SinOsc s3 => dac.chan(3);

    3::second => now;

But I get this error.

chuck](VM): NullPointerException: (UGen link) on line[3] in shred[id=1:MULTI]

Any ideas?
With thanks,
Matthew



Dr. Matthew James Noone
Sarode Artist & Irish Research Council Postdoctoral Fellow
Irish World Academy of Music and Dance
University of Limerick

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