Quad Anti-Aliasing Filter
Quad switched-capacitor low pass filter
Panel · 20.3 × 128.5 mm
Description
WMD's Quad Anti-Aliasing Filter: four matched 4-pole low pass filters in 4 HP, first made to clean the Phase Displacement Oscillator's digital outputs of aliasing and stair-stepping, and useful on their own before or after any digital source.
Key features
- Four switched-capacitor Butterworth low pass filters, channel to channel within 0.5 %
- FREQUENCY knob and a CV input, roughly 1 V/oct, through a vactrol that opens quickly and closes slowly
- CLOCK: an input driving the cutoff at 100 to 1, or an output, by a rear jumper
- Inputs normalled from the PDO expansion header, four outputs and a SUM of the four
- A rear jumper limiting the low cutoff to about 300 Hz; completely analog
Discontinued.