Edit study-sequenced-filter-bass

Admin tokenpatch.def

(patch
  (canvas (width 4080) (height 5028)
    (background "/assets/serge_symbolic_joined.svg"))

(point audio.aux-in 4004 2703 audio "Audio Interface AUX IN")
  (point gtsa.end-out 2865 2794 audio "GTS XL upper END OUT")
  (point gtsa.out 2865 2613 audio "GTS XL upper OUT")
  (point gtsa.trig 2865 2884 audio "GTS XL upper TRIG IN")
  (point gtsb.out 2865 2973 audio "GTS XL lower OUT")
  (point gtsb.trig 2865 3244 audio "GTS XL lower TRIG IN")
  (point mixpro2.in1 3486 1956 audio "Edelweiss right Mix Pro IN 1")
  (point mixpro2.out 3486 1776 audio "Edelweiss right Mix Pro OUT")
  (point nto.pitch 1215 280 audio "NTO 1V/OCT")
  (point nto.saw.out 1095 100 audio "NTO SAW")
  (point seqq.clock 585 1567 audio "SEQQ CLOCK")
  (point seqq.out 585 938 audio "SEQQ OUT (left section)")
  (point vcfq.freq.cv 1965 549 audio "VCFQ VC F")
  (point vcfq.in 1845 279 audio "VCFQ IN")
  (point vcfq.low.out 1965 189 audio "VCFQ LOW")
  (cable c1 clock gtsa.end-out gtsa.trig
    (label "GTS XL upper END OUT -> GTS XL upper TRIG IN"))
  (cable c2 clock gtsa.end-out seqq.clock
    (label "GTS XL upper END OUT -> SEQQ CLOCK"))
  (cable c3 clock gtsa.out gtsb.trig
    (label "GTS XL upper OUT -> GTS XL lower TRIG IN"))
  (cable c4 pitch seqq.out nto.pitch
    (label "SEQQ OUT (left section) -> NTO 1V/OCT"))
  (cable c5 audio nto.saw.out vcfq.in
    (label "NTO SAW -> VCFQ IN"))
  (cable c6 processing gtsb.out vcfq.freq.cv
    (label "GTS XL lower OUT -> VCFQ VC F"))
  (cable c7 audio vcfq.low.out mixpro2.in1
    (label "VCFQ LOW -> Edelweiss right Mix Pro IN 1"))
  (cable c8 audio mixpro2.out audio.aux-in
    (label "Edelweiss right Mix Pro OUT -> Audio Interface AUX IN"))
)

notes.md

# Eight-step filter bass

The SEQQ sets NTO pitch while the clocked GTS envelope closes a low-pass filter around each sustained note.

## Start here

Lower the monitoring level before patching. These are documented patch designs, not claims of hardware audition.

Unless this recipe uses the right Mix Pro for control voltage: center its DC offset, zero unused channels, and bring up only the cabled audio inputs. Connect Audio Interface MIX OUT to your normal monitoring chain.

1. Set SEQQ for forward stepping, narrow output range; tune a short phrase by ear. NTO starts in the bass register.
2. GTS upper: around 2 Hz with fast RISE. Lower: cycle off, fast RISE and decay shorter than a step.
3. VCFQ: audio range, Q modest, cutoff low. Increase VC F depth until the envelope opens each note.

## Cables

1. GTS XL upper END OUT → GTS XL upper TRIG IN.
2. GTS XL upper END OUT → SEQQ CLOCK.
3. GTS XL upper OUT → GTS XL lower TRIG IN.
4. SEQQ OUT (left section) → NTO 1V/OCT.
5. NTO SAW → VCFQ IN.
6. GTS XL lower OUT → VCFQ VC F.
7. VCFQ LOW → Edelweiss right Mix Pro IN 1.
8. Edelweiss right Mix Pro OUT → Audio Interface AUX IN.

## Listen for

Repeated bass notes with changing pitch and a per-step bright attack. There is no VCA, so a little closed-filter bleed is possible.

## Play it

Lengthen the lower FALL for overlapping notes, then shorten it for a plucked line.

## If it misbehaves

No envelope: the upper MAIN OUT must cross the trigger threshold; use a full 0–5 V cycle, not a heavily attenuated signal.

## Module references

- https://serge-modular.com/docs/GTS%20XL%20manual.pdf

Upload audio/video/image