SEMSVF

Oberheim SEM Filter Adaptation

SEMSVF is a Eurorack adaptation of the Oberheim SEM State Variable Filter. Each module being meticulously handmade in limited quantities, with a sound to die for and a look paying homage to an icon.
Tribute edition = white panel; Noir edition = black panel
SEMSVF is the king of 3080 OTA filter designs. A characteristic resonance feedback circuit and accept-no-substitutes obsolete NOS FETS at each stage yields an absolute creamy and silky filter response. LP/HP and BP outputs. A pair of signal inputs with mix pots. That frequency MOD input with signal inverting. That LP/HP/Notch mix sweep control that is CV modulated! You’re welcome.
FREQUENCY | the initial Cutoff Frequency of the filter
RESONANCE | the depth of the peak frequency resonant feedback. Res will not self-oscillate without an input signal present.
IN#1 & IN#2 | Mix together 2 different audio signals, each w/ their own mix pot.
MOD | Modulate the Cutoff Frequency w/ any polar/bi-polar signal. At 12 o’clock, the pot has no modulation. In the Counter-Clockwise direction it can invert the incoming control signal.
KB | Modulate the Cutoff Frequency w/ a V/oct signal or any other polar/bi-polar mod. Self-oscillation resonance will track v/oct when KB is set to 100%.
NOTCH | Sweep the response from Lowpass, through Notch, to Highpass on the LP|HP Output.
LP|HP CV | Use external modulation to control the mix of the LP|HP|Notch. The LP|HP CV knob amount is summed with the NOTCH knob (initial mix setting) above it.
LP|HP OUT | the audio output jack of the LP|HP|Notch filter tap.
BP OUT | the audio output jack of the BP filter tap.

Check my Reverb Store for SEMSVF Availability