All Controls and Patch Points
FREQUENCY MODE 1
– Adjusts the frequency, or cutoff of Mode 1.
2/3 - 1/3 TRACK
- Toggles tracking options for Mode 1.
- Adjusts the master frequency modulation input.
FULL - HALF TRACK
- Toggles tracking options for Mode 2.
FREQUENCY MODE 2
- Adjusts the frequency, or cutoff of Mode 2.
– Adjusts the resonance of Mode 1's filter.
- Adjusts Mode 1's frequency modulation.
– Adjusts the resonance of the Mode 2's filter.
HP / BR
- Toggles the High-Pass and Band-Reject option.
M1 RES CV
– Adjusts Mode 1's resonance control voltage.
M2 RES CV
– Adjusts Mode 2's resonance control voltage.
– Adjusts the master audio input.
– Adjusts Mode 2's frequency modulation.
– Adjust the audio output.
– One volt per octave control voltage input.
– Master frequency modulation input.
– Mode 1 frequency modulation input.
– Mode 2 frequency modulation input.
M1 RES CV
– Mode 1 resonance control voltage input.
M2 RES CV
– Mode 2 resonance control voltage input.
– Mode 1 input.
– Level control for Mode 1.
– Mode 1 output.
– Mode 2 input.
– Level control for Mode 2.
– Mode 2 output.
- 39.7mm with ribbon cable attached
- 42mA (+12 / -12)
BYSIB (Before You Send it Back)
This filter (and the SE88) can be "input driven" to the cutout/cutoff/blackout point, for angry, aggressive unpredictability, and staggered, shell-shocked recovery. We wanted it that way; it’s perfectly harmless OpAmp smashing, for smashing good fun. Think traumatic movie scene after which an actor’s hearing momentarily disappears (extreme wooziness overtakes the balance of his senses—and camera work), high-pitched sounds follow, and then blessed normalcy of awareness and sensory perception gradually, grudgingly return. That. No reboot necessary: just sweep the frequency counterclockwise until it snaps back to its "right mind," and rein in the input and resonance levels—resonance levels below 9:00 are safe; unless of course you want "that" to keep happening. Taunting the edge is entertaining too.
Of Special Note
Two audio paths are involved if you are running the '88 filter in series, so both input levels, and the seeded output level of the 1st stage have to be taken into consideration if a clean sound is desired—either that or keep your resonance setting below 3:00 to avoid the fireworks. This beast's resonance is wide open, with no governor in place—hot-rodded—so expect voltaged chaos when you push it past its "yama-clone" comfort zone.
* From 7:00 (0) to 9:00 our “Negative Resonance Saturation” adds beefiness, boosting the waveform amplitude and taming wavesform transients; set to 9:00 to achieve the cleanest tone possible (effect most pronounced on 3003 filter).