You can select manually for each filter between the -12dB low pass and the -6dB high pass.
The input level is adjustable and has a vast effect on the general behavoiur. The cutoff frequency parameter has two CV inputs: one has a fixed characteristic of 1V/oct and one features a bi-polar attenuator. The resonance can be voltage controlled, too.
The LINK switch couples the filters and the left filter's output is sent to the input of the right one. This makes it possible to create high/low pass filters with double slope or a band pass filter.
Even whem the filters are coupled, the left filter's signal is available at it's output and can be used individually.
The BF-22 inherited not only the early MS-20's legendary sound but also it's audible noise floor. If noise is a factor for you, the BF-22 is probably not your perfect choice.
audio input, audio output
resonance CV input, two cutoff CV inputs
3U Eurorack module, 17HP wide, 47mm deep
power consumption: 40mA @ +12V and 35mA @ -12V