This units "ALL" output does not send any audio. Everything else functions as it should. Unit is being SOLD AS IS.
Four independent gates with selectable amplitude-dependents spectral
characteristics. Knob settings and applied control voltages determine
levels and cutoff frequencies. A summed output facilitates voltage
controlled mixing.
The Model 292,
with the capability of simulating the spectral and amplitude changes
that accompany a receding sound source, is one of several Electric Music
Box modules that can deal with spatial localization and movement.
[Others are the Model 227 System Interface and the 285 Frequency
Shifter/Balanced Modulator (for Doppler shift).]
Frequency
domain gating can impart a dynamic tonal variation to sounds that gives
the listener a sense of absolute loudness. This quality is
characteristic of all acoustic instruments (the harder you strike,
pluck, or bow, the richer the overtone structure), but has been lacking
in electronic instrumentation.