preenfm Forum
PreenFM => preenfm2 and preenfm3 => Topic started by: widdly on August 26, 2014, 07:19:30 AM
-
I cannnot get the bandpass filter cutoff to modulate. If I create a patch with a LP filter and set a modulation matrix to use P1 to modulate the cutoff it works properly. When I change the filter type to BP, I cannot seem to move the cutoff using P1. Anyone else having this problem? Perhaps I'm missing something.
-
It's a know limitation.
Because changing the BP middle frequency requires several heavy operation, so i didn't want to make it change all the time with a modulator.
I think i'll change that.
-
I just had a look at the code. The LP and HP code is pretty tight. I wonder if you could change the BP to a LP and HP in series. Remove the resonance parameter and add a width parameter. The width would be an offset between the LP cutoff and the HP cutoff. The Yamaha SY-77 had something like that.
-
The Machinedrum and Monomachine (and possibly other Elektron gear) have a similar setup and cascaded low and high-pass filters.
a|x
-
@widdly it would be a shame not to have resonance on the BP filter, though.
a|x