syncing two square oscs w/ different pw

[hatembr]

hi

this a technical synthesis question rather than the usual "how-to-make-this-sound" question (expression ? la juho )
correct me if i'm wrong, as far as i know, two oscs with different pulse width values have different phase lenghts, and the definition of syncing two oscs is starting their waveform cycles at the same time so that they have the same phase... so how is it possible to sync two pw modulated oscs? they can never be synced.. or more exactly, if the pulse widths are the same they can, and if they aren't, then could they be really synced?

[Juho L]

Originally Posted by hatembr

so how is it possible to sync two pw modulated oscs? they can never be synced.. or more exactly, if the pulse widths are the same they can, and if they aren't, then could they be really synced? :roll:

The sync works in a way that the synced oscillator phase is reseted on the syncing oscillator's rising edge (in VA's probably just on the start of the wavephase instead of rising edge).

So I see no reason why syncing wouldn't work on PWM oscillators.

[hatembr]

hmmm ok i think i got it
so a first waveform is the master and the other one is the slave, and the second's cycle is cut and restarted at every beginning of the 1st waveform's cycle?

[Juho L]

Originally Posted by hatembr

so a first waveform is the master and the other one is the slave, and the second's cycle is cut and restarted at every beginning of the 1st waveform's cycle?

Exactly!

[hatembr]

great

at the beginning i misunderstood the concept, i thought both waveforms have to start at the same time and end at the same time... i didn't know the slave one has to be restarted depending on the first one's cycle...

[Blank]

Speakin of syncing...my favorite is syncing 2 sines or sine and try together and taking off the keyfollow of the second osc, modulating it a bit and puttin it to about 5-9 + semitone....and sometimes lots of detune, others no detune at all....sometimes u dont need it at all...

peace
Blank

[hatembr]

i tried it, i got an acid sound

[Blank]

yeah, there is all kinds of nice sounds u can get from doing that...alot of pvd sounds can be recreated this way...

peace
Blank

[torte76]

in my understanding, pw controlls the RATIO of the length of the two values of a square wave. the length of the whole phase is constant! pw determines when (within one phase cycle) the square wave switches its value. the frequency (which is the phase length) stays the same, only the point of time when the square goes through zero varies. Of course, the square goes through zero at every beginning of a phase cycle also.

[hatembr]

do u mean this:



the red distance is the phase/cycle, and it's always the same
the green which is the pulse width changes...