Hey Michael, Chubgraphs (and ChuGens) don't support stereo operation at this time. Its something we've thought a lot about, but wanted to focus on getting mono operation right before venturing into stereo/multichannel. Thanks for bringing this issue up though. For what its worth Chugins do support arbitrary numbers of I/O channels, but of course requires implementation in C++. spencer On Wed, Feb 13, 2013 at 3:18 PM, Michael Heuer wrote:

Hello,

Following up on my last email about panning at sample rate in a chubgraph, the following does not seg fault and sounds reasonable

$ chuck --loop [chuck](VM): sporking incoming shred: 1 (panExample.ck)... dump 1.000000 1.000000 0.000000 1.000000 -0.019955 1.000000 ... dump -1.000000 -1.000000 -0.019955 1.000000 0.000000 1.000000

panExample.ck:

TriOsc osc; 220.0 => osc.freq; 1.0 => osc.gain;

SqrOsc lfo => blackhole; 0.4 => lfo.freq; 1.0 => lfo.gain;

osc => Pan2 pan => dac;

spork ~ applyCv(); spork ~ dump();

20::second => now;

<<<"done">>>;

fun void applyCv() { while (true) { 1::samp => now; lfo.last() => pan.pan; } }

fun void dump() { while (true) { 50::ms => now; <<<"dump", lfo.last(), pan.pan(), pan.left.last(), pan.left.gain(), pan.right.last(), pan.right.gain()>>>; } }

But when constructed as a chubgraph as follows, the panning is not heard

$ chuck --loop ... [chuck](VM): sporking incoming shred: 240 (Pan2Module.ck)... "LiCK imported." : (string) [chuck](VM): sporking incoming shred: 1 (pan2ModuleExample.ck)... dump 1.000000 1.000000 0.000000 1.000000 -0.019955 1.000000 ... dump -1.000000 -1.000000 -0.019955 1.000000 0.000000 1.000000

pan2ModuleExample.ck:

TriOsc osc; 220.0 => osc.freq; 1.0 => osc.gain;

SqrOsc lfo; 0.4 => lfo.freq; 1.0 => lfo.gain;

Pan2Module pan; lfo => pan._cv;

osc => pan => dac;

spork ~ dump();

20::second => now;

<<<"done">>>;

fun void dump() { while (true) { 50::ms => now; <<<"dump", lfo.last(), pan.pan.pan(), pan.pan.left.last(), pan.pan.left.gain(), pan.pan.right.last(), pan.pan.right.gain()>>>; } }

Pan2Module.ck:

public class Pan2Module extends Chubgraph { Gain _cv; inlet => Pan2 pan => outlet;

{ _cv => blackhole; spork ~ _tickAtSampleRate(); }

fun void _tickAtSampleRate() { while (true) { 1::samp => now; _cv.last() => pan.pan; } } }

If I use a different LFO, say

SinOsc lfo; 0.1 => lfo.freq; 1.0 => lfo.gain;

I hear some panning, but it is not as distinct as in the non-chubgraph version. Is there some issue with channel routing between outlet and dac in a chubgraph?

michael _______________________________________________ chuck-dev mailing list chuck-dev@lists.cs.princeton.edu https://lists.cs.princeton.edu/mailman/listinfo/chuck-dev