The SH-17 is an advanced sample and hold module.
The rate knob changes the frequency that the samples are taken.
The control voltage amount knob applies the CV socket input to the frequency.
The sync button syncronizes the oscillator to either hz or tempo.
Control voltage input for rate modulation.
Sample and hold output.
22 khz to 0 hz (hz) or 1/64th note to 1 bar (bpm)
A sample and hold module captures the incoming signal and holds that value until its internal oscillator resets, then it repeats the process.
The SH-17 includes the ability to use any external source as a trigger input to capture the incoming signal as well as the ability to syncronize the internal oscillator to either hz or tempo.
The SH-17 also allows you to modulate the rate time with an external controller source.
Wire a noise source into the input socket and wire the output socket into the rack master output. At full left position, the output resembles the original noise source, but when turning the rate knob clockwise, you will hear the noise start to slow down into a random amplitude, but changing at regular intervals.
After you have tried that, run the output of the SH-17 into an oscillator's CV input and modulate pitch.
To override the external oscillator, set the rate knob to 0 hz (full clockwise), then use an external source to trigger the sample and hold function. The sample and hold function will be triggered when the external source goes from a negative phase to a positive phase.
Try using an oscillator or LFO for a more regular trigger source. Add modulation to the oscillator's frequency for more variation.