faust2supercollider "Audio Rate inputs"

[Hyppasus]

Is it possible to implement the choice of rates (Audio, Control) for the inputs of the produced Ugen? The UGen generated by the script assumes Control Rate (kr) inputs. Audio Rate (ar) inputs are crucial for audio rate modulations such as FM. To illustrate the point see the SuperCollider code below.

/*
faust2supercollider -noprefix SimpleOsc.dsp
*/

/*
//SimpleOsc.dsp
import("stdfaust.lib");
decimalpart(x) = x-int(x);
phase(f) = f/ma.SR : (+ : decimalpart) ~_;
osc(f) = phase(f) * 2 * ma.PI : sin;
out = osc(hslider("freq", 440, 0, 10000, 1) )* hslider("gain", 0.961, 0.0, 1.0, 0.001);
process = out <: _,_;
*/

{SimpleOsc.ar(200)}.play

x={arg freq=1, amp=0.5;SimpleOsc.ar(SinOsc.ar(freq,0,400,400)!2)*amp}.play
y={arg freq=1, amp=0.5;SinOsc.ar(SinOsc.ar(freq,0,400,400)!2)*amp}.play

x.set(\freq, 200);
y.set(\freq, 200);

[sletz]

The UGen generated by the script assumes Control Rate (kr) inputs.

Not sure to understand here. Where do you see that?

BTW discussion the issue on Faust Slack channel (see https://faust.grame.fr/community/help/) will probably be easier.

[Hyppasus]

When the resulting Ugen is modulated at the audio rate it can be heard that the input is calculated at a lower rate. Moving towards Slack. Thnak you.

[Hyppasus]

The solution is to use an audio input with si.bus

//SimpleOsc.dsp
import("stdfaust.lib");
decimalpart(x) = x-int(x);
phase(f) = f/ma.SR : (+ : decimalpart) ~_;
osc(f) = phase(f) * 2 * ma.PI : sin;
out = osc(si.bus(1) )* hslider("gain", 0.961, 0.0, 1.0, 0.001);
process = out <: _,_;

Then in supercollider the input should be AR such as

{SimpleOsc.ar(DC.ar(1200),0.1)}.play