The STG Soundlabs .COM module is a comparator and divider network configured for audio applications. Think of it as an elaborate version of the PWM and Sub-octave on an SH-101. If you're not familiar with the SH-101, think of it as a little box you can feed any waveform and get a pulse wave and 4 varieties of sub-octaves from. The Signal Input is where you would put whatever you want to turn into a pulse wave into. The Threshold control sets the "flip" point of the comparator, and has a range of approximately negative five volts to positive five volts. think of it as a pulse width control. The Threshold input is summed with the manual control and allows for external modulation of the threshold point. Think of it as a pulse width modulation input. There are five outputs with 10 volt peak-to-peak signal to play nice with other audio modules. The SH-101 sub-octave had a dc offset which made its bass frequencies weaker than they could have been. The first output is the direct output of the comparator. In pulse width terms, this is 0% to 100%. The second output is a 50 percent duty cycle wave one octave lower than the main output. The third output is a variable output, from 1% to 49% duty cycle, one octave lower than the main output. The fourth output is a 50 percent duty cycle wave two octaves lower than the main output. The fifth output is a 25 percent duty cycle wave two octaves lower than the main output.
