There's an interesting thread that hints at what the Bass MuRF can do (as well as what it can't)
here at the Moog Music Forum.
The Low Pass Filter can be controlled by the built-in envelope follower, by an expression pedal, or by other control voltages (CV), which is where it starts to get really fun. For example, if you have a sample-and-hold unit (as found in the CP-251), then you can get a sound similar to Frank Zappa's "Ships Ahoy" or as found in this clip:
.
To tell the truth, I'm not sure if the Bass MuRF can be used purely as a low-pass filter. You might want to dig around at the
Moog Music Forum - there might be some soundclips that people have posted.
