jubin
Junior Member
Posts: 70
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Post by jubin on Jan 4, 2022 7:48:06 GMT
Hello !
Maybe there is something I don't understand. On my 2OSC/d module, it seems the pulsewidth knob affects only the Square output.
If I do a simple patch like plugging the square of osc1 to HP out : I tweak the PW knob, I hear changes.
If I do a simple patch like plugging the saw of osc1 to HP out : I tweak the PW knob, I don't hear changes.
Is there something I don't get ?
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Post by pt3r on Jan 4, 2022 8:01:43 GMT
I think that is supposed to work like that, how would you imagine the pulse width change to affect for example the saw wave generation? The only way I could see is that it would have an influence on its frequency.
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Post by tIB on Jan 4, 2022 8:12:57 GMT
Hello !
Maybe there is something I don't understand. On my 2OSC/d module, it seems the pulsewidth knob affects only the Square output.
If I do a simple patch like plugging the square of osc1 to HP out : I tweak the PW knob, I hear changes.
If I do a simple patch like plugging the saw of osc1 to HP out : I tweak the PW knob, I don't hear changes.
Is there something I don't get ?
PWM applies to square wave out only - there's no saw shaping. |
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jubin
Junior Member
Posts: 70
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Post by jubin on Jan 4, 2022 9:05:21 GMT
Ok I had this thought, but now I'm sure of it.
Time to go check some theory then.
Thanks to all.
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Post by tIB on Jan 4, 2022 13:55:53 GMT
Ok I had this thought, but now I'm sure of it.
Time to go check some theory then.
Thanks to all.
So PWM, or pulse width modulation, relates to the width of a pulse wave, from 0 to 100% (although thresholds are often set below these as its essentially silence). Some synths let you apply a similar effect over other oscillator waveforms, like your saw wave - this would be waveshaping (or sometimes folding depending on implementation) - so that you can animate other waveforms. Ultimately they are two different things, though given how common waveshaping has become these days I can see how it's become blurred. Tip: Try your saw back into itself via a VCA or attenuator into the FM input. |
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jubin
Junior Member
Posts: 70
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Post by jubin on Jan 4, 2022 15:49:42 GMT
So PWM, or pulse width modulation, relates to the width of a pulse wave, from 0 to 100% (although thresholds are often set below these as its essentially silence). Some synths let you apply a similar effect over other oscillator waveforms, like your saw wave - this would be waveshaping (or sometimes folding depending on implementation) - so that you can animate other waveforms. Ultimately they are two different things, though given how common waveshaping has become these days I can see how it's become blurred. Tip: Try your saw back into itself via a VCA or attenuator into the FM input.
Ok now I understand. Because I was checking some tutorials on drone stuff on Youtube, and I have seen a video where the guy was playing with the PWM of a Sawtooth, so I was a bit confused.
So, tell me if I'm wrong : you can't have a pulsewidth control on a sawtooth, because a sawtooth doesn't have a pulse. Right ?
Thank you so much for the tips, this is exactly what I'm looking to learn these days.  |
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Post by pt3r on Jan 4, 2022 17:20:09 GMT
Correct. |
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