vojko v

in my patcher I tried and failed to phase-sync my saw~ to my looped percussion sound, both triggered by the same frequency slider. When i pull the slider up and return it down, my saw~ phase is getting re-changed, and i want the saw clicks and percussion sound to be in sync.

i assume it's because the change of frequency triggers the phase from 0.

saw-phase-sync

The change of frequency does not trigger the phase from 0, so that's not your problem. But if you have two periodic oscillators in sync and then you change the rate of one of them, they will no longer be in sync. Or if you change them both together but in a slightly different way, they will get out of sync. In your example patch, you are changing the saw~ and phasor~ instantly as soon as you send a number from the slider, but the metro doesn't get changed until its next 'bang', which is why the metro gets out of sync with the saw~. (By the way, your use of both a frequency value in the left inlet of saw~ and a signal from phasor~ at that same frequency in the right inlet of saw~ is redundant.)

Here's an example that demonstrates how things can get out of sync if you change the rate of one of them and then put it back, and it also demonstrates how you can re-sync phasor~s.

Saw~ phase sync