20_20_4
additional parameters: imax1, imax2


This instrument uses a second carrier oscillator to synthesize a
formant region at a given frequency. Both carriers follow the
same amplitude envelope and index envelope, though the formant
carrier is scalable for both amplitude and index. 

The equation 'ifq2=int((iform/ifq1)+.5)*ifq1' lets ifq2 wander
about in close proximity of the formant frequency iform, while
keeping ifq2 in a harmonic relation to ifq1. (Chowning 1973;
Vercoe 1993: morefiles/chowning.orc)

(flowchart)
(.orc and .sco files)

