Channel tags, stems, master chain, FM, K envelope, slide, UDP control, reconnect

Grid grammar:
- a base-36 glyph above a column's top operator tags it with a MIDI channel;
  '>' right of the tag makes the channel mono-legato (60 ms slide)
- operators below a '!' form the stereo master chain: Z delay, W chorus,
  plus any filter/shaper
- X: phase modulation by the cell to the left (and above), index from the right
- K: control envelope; left of an operator it drives that operator's left
  param (2KL5 = 303 filter sweep)
- per-note params: @ velocity, ^ key tracking, ? random; registers now read
  on the digit scale, so MIDI CC and UDP registers have full range

I/O:
- MIDI keeps the channel nibble
- UDP (orca's ';', port 49161): k7 register, *3 bang a column, @34O write
  a glyph, #name load a patch
- --stems n: one mono PipeWire node per channel tag (galdr.ch<tag>),
  sample-aligned with the master; separate nodes because a playback
  stream's AUX ports deliver no data in PipeWire 1.6
- the audio thread reconnects when PipeWire restarts; status line shows it
- patches: ~/hometaping/<date>.galdr by default, .galdr extension, Ctrl+S,
  GALDR_DEBUG=<file> logs events

Examples with render tests: drums, orchestra, acid.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

examples/acid.galdr

@@ -0,0 +1,9 @@
+# acid: a 303-style line on MIDI channel 1 (tag 0, '>' = slide on overlapping notes).
+# A saw > lowpass whose cutoff is swept by K (decay 2, floor 1); accent = velocity -> resonance (@);
+# short amp decay, overdrive. Swap A for U (square), raise K's decay for longer wows.
+...0>
+...A.
+.2KL@
+...E1
+..3S.
+...!.

examples/drums.galdr

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+# bass (ch 1) | kick (ch 10) | snare (ch 11) | hats (ch 12): one drum per MIDI channel
+.0..9....a...b.
+.A..O9...N...N.
+@L5.EX9.6B5.8H.
+.E2..E1..E1..E0
+2S...!..3S...!.
+.!.......!.....

examples/orchestra.galdr

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+# galdr orchestra: one section per MIDI channel (tag glyph above each column).
+# Sections are 4 columns: [left param | chain | right param | gap]. Tweak the digits;
+# @ = velocity, ^ = key tracking, ? = random per note, a-z = registers (MIDI CC / UDP).
+# strings  ch1  saw > lowpass(cutoff=@ velocity, res 2) > env 4/5 > out; the HALL below it: highpass 1 > chorus 2/3 > delay 4/fb from register z (orca: ;z3)
+# low str  ch2  saw > lowpass 3/3 > env 3/4 > soft clip 2
+# brass    ch3  left col = saw>env modulator (no !); right = X FM with index from @ velocity > env 1/2 > soft clip 2
+# horns    ch4  pulse width 2 > lowpass 4/1 > env 3/3 > soft clip 1
+# flute    ch5  left = noise breath (highpass 9 > env 1 > gain 2); right = sine > env rel 3
+# reed     ch6  narrow pulse 1 > bandpass 6/6 > env 2/2 > fold 1
+# clarinet ch7  square (width 5) > lowpass 6/1 > env 2/2
+# timpani  ch8  left = sine>env modulator; right = X index 3 > env 0/4 (play C1-C2)
+# harp     ch9  saw > lowpass: cutoff ^ key-tracked, resonance ? random per pluck > env 0/3
+# choir    ch10 triangle > lowpass: cutoff from register k (orca: ;k5), res 2 > slow env 7/7 > gain 9
+.0...1...2...3...44..5...6...7...8...9..
+.A...A...A2.2U...NO.1U..5U...O7..A...V..
+@L2.3L3.1EX@4L1.9HE36B6.6L1..EX3^L?.kL2.
+4E5.3E4..1E23E3.1E!.2E2.2E2..0E40E3.7E7.
+.!..2S...2S.1S..2G..1F...!....!..!..9G..
+1H...!....!..!...!...!...............!..
+2W3.....................................
+4Zz.....................................