In sonicpi the cutoff value is a midi value from 0 to 131.
MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy.
Default: 100
Must be zero or greater,must be a value less than 131
May be changed whilst playing
[Has slide options to shape changes](#slide)
Is there a way to translate this midi value on khz value ? 30 midi value represents **** hz value ?
Is there a parameter to control the slope of a filter ?
Yeah, that’s something we could perhaps look into exposing but I don’t think we currently do. It’s been a very long time since I designed all the synths and FX though.
Just that the low pass filter synth seemed to behave very badly with values over MIDI 131, so I added a restriction in the safety system. You can disable the safety system in the preferences to go higher - but be very careful with your volume levels as the noise that can come out might damage your ears/speakers.
Filter slope describes how much the signal is attenuated as it goes above the cutoff frequency.
In the Moog ladder-filter, the signal is attenuated by 24db per octave, an MS-20 filter does 12db per octave.
