Edit study-waveform-crossfade

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 mixpro2.in1 3486 1956 audio "Edelweiss right Mix Pro IN 1")
  (point mixpro2.out 3486 1776 audio "Edelweiss right Mix Pro OUT")
  (point nto.saw.out 1095 100 audio "NTO SAW")
  (point nto.triangle.out 1215 100 audio "NTO TRIANGLE")
  (point xfade.cv 1454 370 audio "NTO XFADER VC XFADE")
  (point xfade.in1 1454 190 audio "NTO XFADER IN 1")
  (point xfade.in2 1454 280 audio "NTO XFADER IN 2")
  (point xfade.out 1454 100 audio "NTO XFADER OUT")
  (cable c1 clock gtsa.end-out gtsa.trig
    (label "GTS XL upper END OUT -> GTS XL upper TRIG IN"))
  (cable c2 audio nto.triangle.out xfade.in1
    (label "NTO TRIANGLE -> NTO XFADER IN 1"))
  (cable c3 audio nto.saw.out xfade.in2
    (label "NTO SAW -> NTO XFADER IN 2"))
  (cable c4 processing gtsa.out xfade.cv
    (label "GTS XL upper OUT -> NTO XFADER VC XFADE"))
  (cable c5 audio xfade.out mixpro2.in1
    (label "NTO XFADER OUT -> Edelweiss right Mix Pro IN 1"))
  (cable c6 audio mixpro2.out audio.aux-in
    (label "Edelweiss right Mix Pro OUT -> Audio Interface AUX IN"))
)

notes.md

# A moving waveform crossfade

The NTO triangle and saw share one fundamental, so crossfading changes the waveform without introducing a second pitch.

## 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. Tune NTO as a drone. Set XFADER GAIN to a modest audible level and manual blend near the middle.
2. GTS upper: slow symmetric cycle. Start VC XFADE depth at zero; add enough to move between the two inputs.

## Cables

1. GTS XL upper END OUT → GTS XL upper TRIG IN.
2. NTO TRIANGLE → NTO XFADER IN 1.
3. NTO SAW → NTO XFADER IN 2.
4. GTS XL upper OUT → NTO XFADER VC XFADE.
5. NTO XFADER OUT → Edelweiss right Mix Pro IN 1.
6. Edelweiss right Mix Pro OUT → Audio Interface AUX IN.

## Listen for

A sustained note whose edge changes smoothly; phase cancellation may also change loudness.

## Play it

Bias the manual blend toward one endpoint so the brighter waveform appears only briefly.

## If it misbehaves

Silence at one end means that XFADER input is missing, or GAIN is closed.

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