The creation of this patch got me back into making patches. And the impetus for that was the arrival of the SSBS Pretty Years, a rare distortion/filter unit that uses sub mini tubes and some wild routing. I will be posting a proper comparison following a patch explorer video; the two are surprisingly close despite using digital dirt on the ZOIA.
Basic idea: overdrive/distortion/fuzz pedal on the surface with 4 gain stages and passive EQ. Underneath is this complex routing that comes about when you introduce the voltage-controlled filter section. There are 4 insert points for the VCF (between each gain stage). Here’s a quick guide on what a single activated insert looks like at each separate stage:
INPUT – PREGAIN – VCF – T1 – T2 – T3 – EQ – OUTPUT (1)
INPUT – PREGAIN – T1 – VCF – T2 – T3 – EQ – OUTPUT (2)
INPUT – PREGAIN – T1 – T2 – VCF – T3 – EQ – OUTPUT (3)
INPUT – PREGAIN – T1 – T2 – T3 – VCF – EQ – OUTPUT (4)
VCF has 3 options **WIP for the Notch filter that is present on the original**: LP, BP, HP. Depending on where the VCF is insert, you get very different output based on the VCF settings, gain levels, EQ, and output volume. Where it starts to get rather interesting is when you introduce additional insert points, like below with 1 and 3 active:
INPUT – PREGAIN – VCF – T1 – T2 – VCF – T3 – EQ – OUTPUT (1 & 3)
Now the VCF is being affected by the pregain AND the T2 gain at the same time. This sort of routing will net you results like broken tremolo, sputtered filter fuzz, subtle modulation, and more.
Okay, now that you have a very rapid rundown on the PY, here’s the controls and patch explanation.
CONTROL PAGE – module placement is meant to mimic the original
VCF REZ (value) – VCF resonance. CW is more.
VCF TYPE (UI/display button) – VCF type. Green=LP, Red=HP, Yellow=BP.
GAIN 4 BIAS (value) – Number of bits for Gain 4/bit crusher. CCW is more bits/dirtier, CW is less bits/cleaner.
VCF FREQ (value) – VCF frequency. Starts at middle freq (880Hz), CW is higher, CCW is lower.
I, II, III, IV (pushbuttons) – placement of VCF.
LOW CUT (value) – Gain 1/EQ low shelf. CW is boost, CCW is cut.
GAIN 1 (value) – Gain 1/EQ mid gain. CW is boost, CCW is cut
FM BEHAVIOR (UI/display button) – FM toggle. Cyan=None, Magenta=inverted, White=non-inverted.
GAIN 2 (value) – Gain 2 input gain. CW is more.
BASS (value) – EQ low shelf. CW is boost, CCW is cut.
VOLUME (value) – Output volume. CW is more, CW is less.
DELETE ME (UI/display button) – Delete in case of CPU overload. Seems to be working fine in firmware 1.09 without needing to delete this module, but I left it just in case.
GAIN 3 (value) – Gain 3 input gain. CW is more.
TREBLE (value) – EQ high shelf. CW is boost, CCW is cut.
FM (value) – FM multiplier/amount. CW is more, CCW is less.
Left stomp cycles between VCF types. Middle stomp cycles between FM behavior. CV in can be used for external control over VCF frequency.
READ ON FOR MORE DETAIL. STOP IF YOU WANNA START PLAYING.
IO PAGE – main routing for dirt
In left, EQ for gain 1, OD (pushed) for both gain 2 and 3, Bit crusher for gain 4 (with CV invert module on the bit control), EQ for passive tone, Stereo output with gain control.
VCF PAGE – VCF routing and mixer logic
CV in for VCF frequency. Filter selection via Left stomp and sequencer. Mixer with 4 inputs (each gain stage). Mix level for each is determined by insert points on page 0. Mixer out goes to VCF with 3 outs (lp/bp/hp), sent to audio in switch (channel determined by Left stomp).
FM PAGE – FM logic
Gain 4 output travels to Envelope follower for CV, then into Slew Limiter with separate attack/decay. FM behavior switch takes either 0, slew output inverted, or slew output non-inverted (determined by Middle stomp and sequencer). Switch outputs to multiplier tied to page 0’s FM knob for amount of frequency modulation. Only works if insert point is active.
VCA PAGE – audio routing
4 separate mixers for each gain stage. Channel A’s are the output of gain 1, 2, 3, and 4. Channel B’s are the VCF, with channel selection via insert points on page 0. Outputs to the next gain/EQ along the main routing.
1.00: initial upload.
1.01: changed bias point on Output gain. If you downloaded this early, change the bias on output gain to -11.18dB (while Volume is set to -1). Added SoundCloud upload as sound demo.