[L2Ork-dev] dsp chain indeterminism

[Matt Barber]

Especially considering LFOs etc where a discontinuity could be a really big
and noticeable problem.

On Mon, Jun 25, 2018 at 6:10 PM Matt Barber <brbrofsvl at gmail.com> wrote:

> A virtue of keeping the phase is that it remains relatively continuous
> even with wacko dynamic patching
>
> On Mon, Jun 25, 2018 at 5:31 PM Jonathan Wilkes <jon.w.wilkes at gmail.com>
> wrote:
>
>> Ah yeah, nevermind.  I forgot about the phase. So:
>>
>> 1. frequency is 440
>> 2. a connection is made to [sig~ 0]
>> 3. whatever the phase happened to be at the time of the connection is
>> applied to frequency 0
>>
>> I guess the phase could be reset to zero at graph-building time. On
>> the other hand, people
>> do such odd things with dynamic patching-- who knows if this would
>> break some of that
>> insanity.
>>
>> -Jonathan
>>
>> On Mon, Jun 25, 2018 at 3:55 PM, Matt Barber <brbrofsvl at gmail.com> wrote:
>> > There are also ways of noticing when a connection is attached to the
>> inlet
>> > and that the connection is a signal, and you can reset phase at those
>> times
>> > instead.
>> >
>> > On Mon, Jun 25, 2018 at 3:52 PM Matt Barber <brbrofsvl at gmail.com>
>> wrote:
>> >>
>> >> Only good way to do this is to reset phase when the dsp graph changes.
>> >> [cyclone/cycle~] does this, in fact:
>> >>
>> >> static void cycle_dsp(t_cycle *x, t_signal **sp)
>> >>   cycle_gettable(x);
>> >>     x->x_conv = 1.0 / sp[0]->s_sr;
>> >>     cycle_phase_reset(x); // <------------------------------RESET PHASE
>> >>     dsp_add(cycle_perform, 5, x, sp[0]->s_n,
>> >>     sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec);
>> >> }
>> >>
>> >> On Mon, Jun 25, 2018 at 3:40 PM Jonathan Wilkes <
>> jon.w.wilkes at gmail.com>
>> >> wrote:
>> >>>
>> >>> Hi list,
>> >>>
>> >>> Check out the following patch (attached):
>> >>>
>> >>> 1. Click [bang(. You'll get a block of ones.
>> >>>
>> >>> 2. Disconnect the output of [sig~ 0] from the input of [osc~ 440].
>> >>>
>> >>> 3. Click the [bang( again. You'll get output based on the floatarg
>> 440.
>> >>>
>> >>> 4. Now re-connect [sig~ 0] to [osc~ 440]. You'll get indeterministic
>> >>> output.
>> >>>
>> >>> Is there any workaround to make the output deterministic in this case?
>> >>>
>> >>> -Jonathan
>> >>> _______________________________________________
>> >>> L2Ork-dev mailing list
>> >>> L2Ork-dev at disis.music.vt.edu
>> >>> https://disis.music.vt.edu/listinfo/l2ork-dev
>> >
>> >
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>
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