I've heard that phase modulation and TZLFM are the same when the modulator is a sine wave and different for other waves. It may not be easy to imagine why they're the same in the first case (use your ears), but it is easy to see why they're different in the second case if you think of what happens with a square wave modulator. With phase modulation, when the square flips, the carrier will suddenly jump to a different part of the phase. This means the PM'd wave will have a sharp discontinuity if the modulator has a sharp discontinuity. For TZLFM, this doesn't happen. When the square flips, the shape of the FM'd wave will suddenly change _slope_. You'll get a _corner_ in the wave, not a jump. This means the TZLFM will be far less buzzy.
Thank you a lot, this tutorial is really useful. I've found it struggling to find out which VCV Rack oscillator has a working Thru-zero feature. Could never think that it would be the standard WT. Pity that Squinky Labs have none of any like that because their oscillators sound very nice, almost aliasing-free.
Thanks so much Jakub, this is so interesting ! I still have difficulties to understand why phase modulation and FM can get similar results ? Are the added harmonics identical in both cases ??
PM is, in ways, an approximation of FM. When you move phase, you're also moving the pitch, in a sort of "doppler effect" way. If you're continuously moving phase with your modulator, you're essentially doing the same thing FM does (which is, to change pitch depending on the input). When using only sine waves as operators, implementing phase modulation can be virtually identical to FM under the same conditions (but different parameters).
This is the greatest demonstration of PM vs FM that I’ve ever seen. Makes it so simple. Thanks!
I've heard that phase modulation and TZLFM are the same when the modulator is a sine wave and different for other waves. It may not be easy to imagine why they're the same in the first case (use your ears), but it is easy to see why they're different in the second case if you think of what happens with a square wave modulator.
With phase modulation, when the square flips, the carrier will suddenly jump to a different part of the phase. This means the PM'd wave will have a sharp discontinuity if the modulator has a sharp discontinuity.
For TZLFM, this doesn't happen. When the square flips, the shape of the FM'd wave will suddenly change _slope_. You'll get a _corner_ in the wave, not a jump. This means the TZLFM will be far less buzzy.
Thanks. :)
awesome! also i like the reverb on your voice :)
thank you, i am new to vcv and this is fascinating.
Nice discovery and good explanations.
Thank you a lot, this tutorial is really useful. I've found it struggling to find out which VCV Rack oscillator has a working Thru-zero feature. Could never think that it would be the standard WT. Pity that Squinky Labs have none of any like that because their oscillators sound very nice, almost aliasing-free.
interesting, thanks
very usefull information. thanks!
Thanks so much Jakub, this is so interesting ! I still have difficulties to understand why phase modulation and FM can get similar results ? Are the added harmonics identical in both cases ??
PM is, in ways, an approximation of FM. When you move phase, you're also moving the pitch, in a sort of "doppler effect" way. If you're continuously moving phase with your modulator, you're essentially doing the same thing FM does (which is, to change pitch depending on the input).
When using only sine waves as operators, implementing phase modulation can be virtually identical to FM under the same conditions (but different parameters).
@@nitroanilinmusic Thanks 😊
how does the bogaudio FM-OP fit into this categorisation?
edit: just tried it out, it's also phase modulation.
heeeeey ggouuyyyssseeh
this rules. nice work