| Module A-128 (Fixed Filter Bank) is a filter bank, made up of 15
parallel band pass filters, all with fixed middle frequencies and
bandwidth (50 Hz / 75Hz / 110Hz / 150Hz / 220Hz / 350Hz / 500Hz / 750Hz
/ 1.1kHz / 1.6kHz / 2.2kHz / 3.6kHz / 5.2kHz / 7.5kHz / 11 kHz).
Each band pass filter has its own amplitude control knob, with which
that frequency band can be attenuated. The bandwidth of each of the
filters is approximately half an octave.
The signal at the output of the A-128 contains a mix of all the
filters, depending on the position of each one's amplitude control
The filter bank's main job is to emphasise individual sections of the
whole audio frequency range.
> tech specs
- Width : 20HP
- Depth : 60mm
- Current consumption : 20mA