Dear Dario,
I do not really understand the difference of the two, or why the second
("computed but not used") makes sense... since the computation in between state
changes (to my understanding) should (by definition) not change, there would
not be any difference to the first case... of course, interpolation between
steps need (and could be) calculated with e.g. linear interpolation _after_ the
demand-rate signal computation, in case one would not want to have "clicks"...
do I understand you correctly?
cheers
Till
> On 14. Jul 2020, at 15:00, Dario Sanfilippo <sanfilippo.da...@gmail.com>
> wrote:
>
> Hello, dear Oleg and Till.
>
> From the perspective of a composer/performer who works with live audio, and
> considering that Faust is intrinsically real-time, would it make sense to
> have two control primitives, one where computation is skipped when it is not
> requested, and one where it is computed but not used?
>
> I would find the second case useful as it would always require maximum
> computation and the control rate could be changed on-the-fly without worrying
> about clicks, provided that no clicks occurred at audio-rate calculations.
>
> Best,
> Dario
>
>
> On Tue, 14 Jul 2020 at 13:43, Oleg Nesterov <o...@redhat.com> wrote:
> On 07/14, Till Bovermann wrote:
> >
> > Thanks also to you, Oleg; is there somewhere an example for the control
> > primitive,
>
> Sorry, I do not know. But see below.
>
> However, I did "git pull" and it seems that "control/enable" are already
> supported in FIR scalar mode. Probably the commit 32846af52e92498? Cool.
>
> Say,
>
> process = control(sin, _);
>
> compiles to
>
> virtual void compute(int count, FAUSTFLOAT** inputs, FAUSTFLOAT**
> outputs) {
> FAUSTFLOAT* input0 = inputs[0];
> FAUSTFLOAT* input1 = inputs[1];
> FAUSTFLOAT* output0 = outputs[0];
> float fTemp0 = fTempPerm0;
> for (int i = 0; (i < count); i = (i + 1)) {
> if (float(input1[i]) != 0.0f) {
> fTemp0 = std::sin(float(input0[i]));
> }
> output0[i] = FAUSTFLOAT(fTemp0);
> }
> fTempPerm0 = fTemp0;
> }
>
> note that sin(input0[i]) is only evaluated if input1[i] != 0.
>
> Oleg.
>
>
>
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