The system electrically rotated the waveform of the right channel by up to 120 degrees to control the buildup of center information during a simple mono downmix. It is not fully known how exactly the circuit accomplished this, however a technician who worked there in 1972-73, indicates here that the CSG appeared to have split one stereo channel into up to 8 single octave channels followed by eight ganged selectable phase shift networks, controlled via front panel setting. Then a summing amplifier was used for recombination of multiple audio channels into one, followed by a transformer isolated balanced output. The other channel was not encoded and simply passed thru, via another audio transformer. This is how the effect could be encoded without slightly delaying one channel, which would have only provided close enough to 90 degree phase shift within less than an octave and somewhere between 0 and 180 degrees of phase shift is approached at the highest and lowest frequencies in the audio spectrum.