Open misterbo94 opened 2 years ago
Ah, yeah, that's tricky. The trouble is that the Waveform
used by Oscil
is sampled using a 0-1 phase value, so there isn't a reliable moment when the waveform "finishes" playing. The moment where is wraps could happen at any point in the buffer provided to AudioListener
but that information is not really available from there. What I would do in this case is to use multiple Oscil
objects that each reference a different Waveform
. Run them all continuously and when you want to swap to a particular Waveform
fade out the currently audible Oscil
with a Line
patched to its amplitude
property and fade in the Oscil
you want to hear with a different Line
patched to its amplitude
. You could make these fades extremely short so that it sounds more like a swap. If you want to directly update the Waveform
used by a particular Oscil
you could do so while its amplitude
is 0.
Thank you, that's a very good idea. However, if I'm correct, for each Oscil I'd need two Lines patched to the same UGenInput (for fading in and out), but that's not possible. Is there something I'm missing?
You only need one Line
. When you want to fade out an Oscil
you'd do something like call activate(0.05,1,0)
on the attached Line
and then later when you want to fade that Oscil
back in, you'd call activate(0.05, 0, 1)
on that same Line
.
When using an Oscil, the waveform can simply be a float array, which is not copied but referred to, so in order to swap the waveform it is sufficient to change every element of the array. However, if the waveform needs to be updated frequently, this creates a lot of discontinuities in the signal, resulting in a popping sound for each swap. This happens also for all the wavetable modifiers like flip(), invert(), ... I would like to have a sort of "protection" when updating the waveform, so that it will be effectively changed only when the current one has finished playing. In that way, as long as the last value of a waveform and the first value of the next one are similar, there should be no popping sound. I've left a simple processing sketch to show the problem. wavetableproblem.txt
Is there a way to do that with existing methods? I've tried with Audiolisteners but without any luck. If not, how can I solve this problem considering I'm not a super-advanced coder? Thank you