Archive of the former Yahoo!Groups mailing list: MOTM

Here are some different plots of the MOTM-480 VCF, which is a clone of the Yamaha CS-80 filter
section. The filter structure is 2 state-variable filters in series, but with independent
resonance and cutoff frequency panel controls. The patched control voltages (cutoff and
resonance) add/subtract an ∗offset∗ from the panel settings. You can get all types of filter
curves, as the graphs show.

There are 2 documents: the MS Word version is easier to read and 1/10th the size of the PDF (PDF
does NOT like BMP files!)

MS Word (150K): www.synthtech.com/files/m480.doc

PDF (1.3MB): www.synthtech.com/files/m480.pdf

Sound examples in a few weeks as the tweaking begins :)

Plots generated on an Audio Precision Series 2 DSP analyzer (www.audioprecision.com)

Paul S.