A-128 Fixed Filter Bank

Doepfer's fixed filter bank in 20 HP: fifteen band-pass filters in parallel at fixed frequencies from 50 Hz to 11 kHz, each with its own level, their sum at the output, to lift or cut parts of the audio spectrum.

Key features

• Fifteen band-pass filters: 50, 75, 110, 150, 220, 350, 500, 750, 1100, 1600, 2200, 3600, 5200, 7500 and 11000 Hz
• Each about half an octave wide, with its own level knob, 0 shutting the band off
• One audio input and one output carrying the mix of all fifteen bands