808 Rimshot
The 808 rimshot is built by combining two inharmonic tones. These are mixed into a VCA and shaped by a snappy, percussive envelope. The VCA adds extra harmonics, while a high-pass filter cuts out lower frequencies.
Cascadia’s VCA is quite clean. So, we’ll replace the VCA with the wave folder. Put it between the mixer and filter. Then set the mod level just high enough that it adds saturation without getting too biting.
1: The oscillators will provide the body of the sound. Tune both to an inharmonic combination.
1a: Tune VCO-B to A4 -42 cents.
1b: Tune VCO-A to G#6 +6 cents.
2: Patch either the sine or triangle from VCO-B to mixer in 1. Then raise the mixer in 1 and 2 channels.
3: Patch the mixer to the wave folder audio in, and slightly raise the wave folder mod level amount.
4: Patch the wave folder out to the filter in. Switch the filter to HP4.
5: Mult ENV-B to the wave folder CV in and VCA-A level in. Set the envelope rise and shape all the way down. Adjust the fall level as you fire the trigger. Keep it just at the edge of where it stops being a click. It should stay clicky, but the body of the sound should just be apparent.
6: Raise filter resonance (Q), and adjust the frequency to cut the low frequencies.
7: Set Drive to taste.
Optionally: Try it with and without soft clipping in both the mixer and output section.
Further Reading
A short blog post on how to recreate the 808 Rimshot.
Pg. 6 has a brief description of the combined clave/rimshot circuit (RS/CL).
Pg. 7 has a block diagram (top right, under the BD).
Pg. 9 the circuit (bottom right).
Pg. 14 has a chart displaying the frequency, and decay time (RS).