Wiardgroup

The Mixolator module can be used as two simultaneous pan 
units. These can feed the left and right channels (for front and 
rear) in a 4 channel quadraphonic setup or 5.1 system.

Another Mixolator panner can be used to pan between front and 
rear.

The combination of the two modules allows quadraphonic 
panning under voltage control. Route the Joystick X axis to both 
Mixolator ZMOD inputs for left and right positioning front and rear. 
Route the Joystick Y axis to ZMOD input on the mixolator panning 
between the front and rear L-R panners.

The VCA mode in the Borg filter is a 6 dB/octave filter/attenuator 
tha mimics the acoustic effect of approaching and receding 
sound sources (Thanks to Don Buchla of course). Using a 
sumer and the triangle wave function in the Waveform City, you 
can make a "dome generator" which will automatically fade in 
the sound as it approaches the center and fade out the sound 
towards the corner joystick positions.

Use some of the "dome" signal to shift the pitch of the oscillator 
to mimic doppler shifting (pitch shift up approaching, pitch shift 
down receding). You can also use the "dome" signal with the 
remaining Mixolator section to control the amount of 
reverberation, distant sound sources have more reverberation 
than nearby sound sources, so crossfade to the reverberated 
signal towards the joystick corners.