The Drop is all about detailed analog models with characterful non-linearities. Having a filter without non-linearities would mean that the filter is the only one in the entire set of 10 that would behave completely differently when comparing between circuits. A linear filter cannot self oscillate without infinite growth to the self oscillating resonance amplitude and no matter the input signal level there is no change in sound apart from the equivalent increase in output signal level. The clean filters would not only need a very clear way to differentiate it from the others, but also features like the Drive knob, > 100% resonance, and resonance trim knobs all would need to be disabled as they wouldn't do anything.What I meant was a clean low cpu digital mode like Ableton's. Sometimes the non linearity is not needed, and yes I can just pull up a clean eq plugin but adding it here is just more convenient and I might want a clean highpass but an analog lowpass for example.Also, what is the use case for the "Clean SVF"? Do you want a filter with lower CPU?Will you add the VCV filters to this in the future, as well as the clean SVF one like in Ableton? Those VCV filters are state of the art.
The easiest workaround right now is to use a low cpu filter to begin with, say the KSM, and switch off HD mode for it, and then adjust the input pad to -12 dB (which boost the output by +12 dB), and then adjust the pre to -12 dB and post to 0 to +12 dB. Switch off the Boost button, and use the Drive knob on the filter you want to have drive. This leads to the loudest harmonic of around -80 dBFS, so a sine wave at 0dBFS has a very subtle -80 dBFS amount of drive added. If you are using drive on the other filter you will not hear this drive on the "clean" filter.
So a completely linear filter is not really an option for The Drop. One option could be to have both an SVF and an SKF with only a single resonance non-linearity and an input op-amp soft-clip non-linearity (other filters in The Drop have a minimum of 6 non-linearities). Then at least then the drive knob, and the > 100% resonance knob, and resonance trim knobs would do something, but only if you want them to. If you kept the resonance at 0%, and didn't send in loud signals then I could construct the filters to have a completely clean sound with no drive added. As soon as you increase the resonance then you would again need to adjust the gain staging as listed above. Does that sort of filter sound useful?
Statistics: Posted by andy-cytomic — Thu Feb 13, 2025 3:17 am