Edit study-beating-sines

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.sine.out 2985 2613 audio "GTS XL upper SINE")
  (point gtsa.trig 2865 2884 audio "GTS XL upper TRIG IN")
  (point gtsb.end-out 2865 3154 audio "GTS XL lower END OUT")
  (point gtsb.sine.out 2985 3153 audio "GTS XL lower SINE (AC)")
  (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.in2 3486 2046 audio "Edelweiss right Mix Pro IN 2")
  (point mixpro2.out 3486 1776 audio "Edelweiss right Mix Pro OUT")
  (cable c1 clock gtsa.end-out gtsa.trig
    (label "GTS XL upper END OUT -> GTS XL upper TRIG IN"))
  (cable c2 clock gtsb.end-out gtsb.trig
    (label "GTS XL lower END OUT -> GTS XL lower TRIG IN"))
  (cable c3 audio gtsa.sine.out mixpro2.in1
    (label "GTS XL upper SINE -> Edelweiss right Mix Pro IN 1"))
  (cable c4 audio gtsb.sine.out mixpro2.in2
    (label "GTS XL lower SINE (AC) -> Edelweiss right Mix Pro IN 2"))
  (cable c5 audio mixpro2.out audio.aux-in
    (label "Edelweiss right Mix Pro OUT -> Audio Interface AUX IN"))
)

notes.md

# Two slopes, beating sines

Two independently cycling GTS channels make slow acoustic beating after a real mixer.

## 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 each GTS channel to roughly symmetric rise/fall in the audio range.
2. Match their pitches by ear; balance Mix Pro channels 1 and 2 at a modest level.

## Cables

1. GTS XL upper END OUT → GTS XL upper TRIG IN.
2. GTS XL lower END OUT → GTS XL lower TRIG IN.
3. GTS XL upper SINE → Edelweiss right Mix Pro IN 1.
4. GTS XL lower SINE (AC) → Edelweiss right Mix Pro IN 2.
5. Edelweiss right Mix Pro OUT → Audio Interface AUX IN.

## Listen for

A nearly pure sustained tone with slow pulses in loudness as the two frequencies drift apart.

## Play it

Detune one FALL control by a tiny amount, then try a fifth instead of unison.

## If it misbehaves

If the result is a pair of clicks, raise both slope rates into the audio range.

## Module references

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

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