Edit study-audio-sampling

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 gtostep.in 705 2226 audio "Dual GTO left Stepped IN")
  (point gtostep.out 705 2405 audio "Dual GTO left Stepped OUT")
  (point gtostep.sample 645 2180 audio "Dual GTO left Stepped SMPL")
  (point gtsa.end-out 2865 2794 audio "GTS XL upper END OUT")
  (point gtsa.trig 2865 2884 audio "GTS XL upper 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.sine.out 1334 100 audio "NTO SINE")
  (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 gtostep.sample
    (label "GTS XL upper END OUT -> Dual GTO left Stepped SMPL"))
  (cable c3 audio nto.sine.out gtostep.in
    (label "NTO SINE -> Dual GTO left Stepped IN"))
  (cable c4 audio gtostep.out mixpro2.in1
    (label "Dual GTO left Stepped OUT -> Edelweiss right Mix Pro IN 1"))
  (cable c5 audio mixpro2.out audio.aux-in
    (label "Edelweiss right Mix Pro OUT -> Audio Interface AUX IN"))
)

notes.md

# GTO audio-rate sampling

GTO Stepped samples NTO audio at a separate clock rate, creating rate-dependent aliases.

## 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. NTO: around 100–200 Hz. GTO left Stepped: cycle off, SMPL up, RATE fully fast.
2. GTS upper: start around 1 kHz, with a reasonably symmetric cycle; keep the sample clock below about 2 kHz.

## Cables

1. GTS XL upper END OUT → GTS XL upper TRIG IN.
2. GTS XL upper END OUT → Dual GTO left Stepped SMPL.
3. NTO SINE → Dual GTO left Stepped IN.
4. Dual GTO left Stepped OUT → Edelweiss right Mix Pro IN 1.
5. Edelweiss right Mix Pro OUT → Audio Interface AUX IN.

## Listen for

Rough stepped audio with new pitches and beating that move as the sample rate changes.

## Play it

Sweep the clock downward through the NTO frequency while holding the NTO pitch still.

## If it misbehaves

A flat output at very high clock rates can be the GTO sample-window limit; slow the clock.

## Module references

- https://serge-modular.com/docs/Serge%20Dual%20GTO%20user%20manual.pdf

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