I’m late to the party, but I only recently realized that this can be a mod voice with nb. This script on its own is amazing. As a playable voice on top of other scripts….holy shit. Thank you for all your hard work on everything @sixolet. Much appreciated. I’m slowly building a TouchOSC template as a makeshift screen to pair along with the mod. I can midi map with 2host instead of OSC.
10 Likes
I think I found the problem. It’s a hilarious one. For performance reasons, I used FSinOsc for the sine wave component of the voices. It has this “lovely” property where if you modulate the pitch it will change amplitude some. Higher pitch gives it a lower amplitude, and lower pitch gives it a higher amplitude. This effect isn’t all that strong, so I ignored it for the purpose of making a more efficient synth voice (a Pi 3b+ can’t effectively run 6 voices if I use the traditional SinOsc).
The problem is that the effect isn’t symmetric. I don’t fully understand it, but I gather that the amplitude increases when you lower the frequency more than it decreases when you raise the frequency, so if you’re constantly re-using the same synth to have an analog-style envelope retrigger in the voice allocator, you can raise and lower the frequency enough times that it is an exponentially strong effect and takes over the sound.
I just pushed a change to doubledecker that limits the number of times a voice is reused.
This… unfortunately will affect legato playing. I will consider what to do about that.
9 Likes
thanks for the fix and the killer synth!
2 Likes
And just pushed one more change to turn the voice reuse limit up to 100 for mono lines, because I think that’s the lesser of two evils, and anyway the problem mostly appears when the pitch changes a lot when the voice is reused.
6 Likes
Just curious, not requesting….has anyone uploaded a video of doubledecker with MidiFighter Twister?
1 Like