This post was originally published at synthtopia.com
This video, via Roberto Raineri-Seith, demonstrates the Moog 907A Fixed Filter Bank (with inductors) from a System 15 modular system.
The 907A Fixed Filter Bank is a vintage Moog modular design that features a lowpass, highpass, and 8 bandpass filters. They are not voltage-controllable. The combination of lowpass and highpass filters at the extreme ends and bandpass filters in the middle allows for fine control over which frequencies are allowed through the filter.
Author : Jules Combarieu