I encountered that too and reported it to Stephane. faust2caqt had no
problem. Looking forward to hearing what that's about!
On Sat, Feb 25, 2023 at 4:05 PM Dario Sanfilippo <sanfilippo.da...@gmail.com>
wrote:
> Just so you know, Julius' code gives me this assert on the IDE:
>
> ASSERT : please report this message and the failing DSP file to Faust
> developers (file: wasm_code_container.hh, line: 60, version: 2.54.11,
> options: -lang wasm-ib -cn
> a08c5ceec105cc33e58fe2dfaaa8d2f0a80eaf39e4a593811bb636d3de7a14d3 -es 1 -mcd
> 16 -single -ftz 0 )
>
> Here is a non-delay-based alternative (tested very briefly, but it seems
> to work):
>
> import("stdfaust.lib");
>
> PI = ma.PI;
> TWOPI = 2.0 * ma.PI;
>
> phasor(freq, phase) = ma.frac((loop ~ _) + phase / TWOPI)
> with {
> loop(y) = ma.frac(freq / ma.SR + y);
> };
>
> tri(ph) = abs(ma.frac(ph - .25) * 4.0 - 2.0) - 1.0;
> ph0 = hslider("ph0", 0, -PI, PI, .001);
> ph1 = hslider("ph1", -PI / 2.0, -PI, PI, .001);
> f = hslider("freq[scale:log]", 1000, 20, 20480, .001);
>
> // Oscillation by phase-mod
> // process = os.oscp(0, os.phasor(TWOPI, 1000)) ,
> // sin(TWOPI * phasor(0, os.phasor(TWOPI, 1000))) ,
> // tri(phasor(0, os.phasor(TWOPI, 1000)));
>
> process = os.oscp(f, ph0) ,
> os.oscp(f, ph1) ,
> sin(phasor(f, ph0) * TWOPI) ,
> sin(phasor(f, ph1) * TWOPI) ,
> tri(phasor(f, ph0)) ,
> tri(phasor(f, ph1));
>
> Dr Dario Sanfilippo
> http://dariosanfilippo.com
>
>
> On Sun, 26 Feb 2023 at 00:28, Julius Smith <julius.sm...@gmail.com> wrote:
>
>> Ok, I see it. The implementation of os.lf_sawpos_phase is impulse-based:
>>
>> lf_sawpos_phase(freq,phase) = phasor_imp(freq, (1-1'), phase);
>>
>> This means it is only sampled at time zero. For continuous phase
>> control, you want something delay based, e.g.,
>>
>> lf_triangle_phase (freq, phase) = os.lf_triangle(freq) @ (phase *
>> ma.SR/freq);
>>
>> Here is my updated test program (no scope needed - I used faust2caqt):
>>
>> import("stdfaust.lib");
>>
>> lf_triangle_phase(freq, phase) = os.lf_triangle(freq) @ (phase *
>> ma.SR/freq);
>> lfo_freq = hslider("[1] Freq", 0.5, 0.001, 50, 0.01);
>> lfo1 = lf_triangle_phase(lfo_freq, 0);
>> lfo_phase = hslider("[2] Phase", 180, 0, 360, 1) / 360;
>> lfo2 = lf_triangle_phase(lfo_freq, lfo_phase);
>> process = lfo1, lfo2 : hbargraph("[3] 0",-1,1), hbargraph("[4]
>> Phase",-1,1);
>>
>> On Sat, Feb 25, 2023 at 2:03 PM Christopher Arndt <ch...@chrisarndt.de>
>> wrote:
>>
>>> Am 24.02.23 um 21:50 schrieb Julius Smith:
>>> > Hmmm, it looks to me like it should be working.
>>> > I adapted your test program for use with faust2plot, and it's working
>>> > for me:
>>>
>>> Yes, it works, if the phase is set initially. But what I want is to
>>> change the phase of one LFO at run-time with a parameter and that
>>> doesn't seem to work.
>>>
>>> Here are two images, which demonstrate this, I hope:
>>>
>>> 1) your code (lfophase.dsp) compiled with faust2jack and its output send
>>> into a stereo oscilloscope. the two LFOs have different phase
>>>
>>> https://0x20.eu/nc/s/kWSwRE2oHD4rStt/preview
>>>
>>> 2) The code from my original post (lfophase2.dsp) compiled with
>>> faust2jaqt again with its output into the scope. I have set the phase
>>> two 91 after staring the program, but the output as seen in the scope
>>> never changes and the two LFOs are still at the same phase.
>>>
>>> https://0x20.eu/nc/s/Y47eaLK8DGZZTbk/preview
>>>
>>>
>>> Chris
>>>
>>>
>>>
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>>> Faudiostream-users@lists.sourceforge.net
>>> https://lists.sourceforge.net/lists/listinfo/faudiostream-users
>>>
>>
>>
>> --
>> "Anything that can be automated should be"
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>
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