P10.6: tune SFX bank to the candy character (real CC0 marimba/glock + pops)

Refine the same drop-in bank toward Candy-Crush candy/jelly character; engine
(audio.sx) untouched, same filenames/format.

- swap: freesound CC0 "Pop 01" (LilMati #506546) — soft light blip.
- match: freesound CC0 "Cartoon Pop" (Mish7913 #741368) — bright juicy candy pop.
- combo1..5: VCSL CC0 Marimba F5, real-resample pitch-laddered to a C-major
  pentatonic (C5 D5 E5 G5 A5) — warm/sweet mallet sparkle, not glassy; ascending.
- win: VCSL CC0 Glockenspiel C5/G5/C6 sequenced into a sugary ascending bell
  fanfare.
- lose: VCSL CC0 Marimba B4->G4 descending — soft gentle "aww".

All real free CC0 assets (NOT ripped from Candy Crush); provenance + license per
cue in LICENSE.txt. Mono/44100/Int16, <=580 ms, peak <=-9 dBFS (lose -12).
Combos ascend (1045<1173<1317<1566<1758 Hz). Gate green; all 9 cues load on sim.

assets/audio/LICENSE.txt

@@ -1,46 +1,73 @@
 m3te sound effects
 ==================
 
-Every cue is a real, free-licensed (CC0 1.0, public domain) sound effect from
-Kenney (www.kenney.nl), processed to the format iOS System Sound Services loads
+Every shipped cue is a REAL, FREE-licensed sound effect (all CC0 1.0 / public
+domain), chosen and processed to EVOKE a sweet, juicy, tactile candy-game feel.
+
+  >>> NONE of these are ripped from Candy Crush or any King-owned audio. They are
+  >>> independent CC0 assets that merely evoke a similar candy/jelly character.
+
+All files are delivered in exactly the format iOS System Sound Services loads
 directly via audio.sx: WAVE / mono / 44100 Hz / signed-16-bit PCM. The whole
-bank is peak-normalized to a quiet -9 dBFS (System Sound Services has no runtime
-volume, so loudness is baked into the file) — measurably quieter and cleaner
-than the previous synthesized bank.
+bank is peak-limited to a quiet -9 dBFS (System Sound Services has no runtime
+volume, so loudness is baked into the file); the lose "aww" sits a touch lower
+at -12 dBFS.
 
-CC0 1.0: https://creativecommons.org/publicdomain/zero/1.0/
+Licenses
+--------
+CC0 1.0 (public domain): https://creativecommons.org/publicdomain/zero/1.0/
+Versilian Community Sample Library (VCSL), CC0: https://github.com/sgossner/VCSL
+Freesound (per-sound CC0, links below): https://freesound.org
 
-Per-file provenance
--------------------
+Per-file provenance & candy character
+-------------------------------------
 
-swap.wav    — "pluck_002" from Kenney "Interface Sounds" (CC0)
-              https://kenney.nl/assets/interface-sounds
-match.wav   — "confirmation_002" from Kenney "Interface Sounds" (CC0)
-              https://kenney.nl/assets/interface-sounds
-win.wav     — "powerUp7" from Kenney "Digital Audio" (CC0)
-              https://kenney.nl/assets/digital-audio
-lose.wav    — "minimize_006" from Kenney "Interface Sounds" (CC0)
-              https://kenney.nl/assets/interface-sounds
+swap.wav    — soft, light blip/bubble.
+              Freesound "Pop 01" (#506546) by LilMati — CC0.
+              https://freesound.org/people/LilMati/sounds/506546/
+              Trimmed to the single pop (~89 ms), faded, peak-normalized.
 
-combo1.wav .. combo5.wav — "glass_001" from Kenney "Interface Sounds" (CC0)
-              https://kenney.nl/assets/interface-sounds
-              The single glass-bell sample is pitch-laddered up a pentatonic run
-              (0, +2, +4, +7, +9 semitones) by real resample DSP (ffmpeg
-              asetrate/aresample), so the cascade cue ascends in pitch with
-              cascade depth. Measured fundamentals (tools/measure_pitch.py):
-              combo1 1918, combo2 2153, combo3 2416, combo4 2874, combo5 3226 Hz
-              (combo1 < .. < combo5, ascending).
+match.wav   — bright, juicy candy POP (the "tasty" match reward).
+              Freesound "Cartoon Pop" (#741368) by Mish7913 — CC0.
+              https://freesound.org/people/Mish7913/sounds/741368/
+              Trimmed to the single pop (~260 ms), faded, peak-normalized.
 
-clear.wav   — "confirmation_001" from Kenney "Interface Sounds" (CC0)
+combo1..5.wav — warm, sweet MARIMBA mallet notes ascending a C-major pentatonic
+              (C5 D5 E5 G5 A5) — the candy-cascade sparkle, warm not glassy.
+              Source: VCSL "Marimba" single note F5 (med velocity) — CC0.
+              github.com/sgossner/VCSL .../Idiophones/Struck Idiophones/Marimba
+              The one marimba note is real-resample pitch-laddered (ffmpeg
+              asetrate/aresample) to C5/D5/E5/G5/A5, trimmed (~280 ms), faded,
+              peak-normalized. Measured dominant partials (tools/measure_pitch.py),
+              strictly ascending:
+                combo1 1045 Hz < combo2 1173 < combo3 1317 < combo4 1566 < combo5 1758
+              (these are the marimba's strong ~2x partial; perceived pitch is
+              one octave lower: C5 523 .. A5 880.)
+
+win.wav     — short, sugary, triumphant GLOCKENSPIEL bell fanfare.
+              Source: VCSL "Glockenspiel" notes C5 + G5 + C6 (med velocity) — CC0.
+              github.com/sgossner/VCSL .../Idiophones/Struck Idiophones/Glockenspiel
+              The three real bell notes are trimmed and sequenced into an
+              ascending C5->G5->C6 arpeggio (ffmpeg adelay/amix), ~580 ms,
+              faded, peak-normalized.
+
+lose.wav    — soft, gentle, descending "aww" (not a buzzer).
+              Source: VCSL "Marimba" notes B4 + G4 (med velocity) — CC0.
+              github.com/sgossner/VCSL .../Idiophones/Struck Idiophones/Marimba
+              The two real marimba notes are sequenced into a gentle descending
+              B4->G4 gesture (ffmpeg adelay/amix), ~490 ms, faded, normalized to
+              a softer -12 dBFS.
+
+clear.wav   — "confirmation_001" from Kenney "Interface Sounds" (CC0).
               https://kenney.nl/assets/interface-sounds
-              Not loaded by the shipped game; kept as a CC0 reference clip.
+              NOT loaded by the shipped game; kept as a CC0 reference clip.
 
 Processing
 ----------
 
-Sources downloaded as the official Kenney CC0 .ogg packs and converted with
-ffmpeg (decode + mono + 44100 Hz + peak-normalize to -9 dBFS; combos additionally
-pitch-shifted), then re-wrapped to the canonical WAVE/LEI16 container with
-afconvert. The shipped game never runs any build tool; it only loads the
-finished WAVs. (tools/synth_audio.py is the now-unused historical synth tool
-that produced the previous bank.)
+Sources downloaded as their original CC0 files (VCSL .wav notes from GitHub;
+Freesound CC0 high-quality previews). Each cue was decoded, down-mixed to mono,
+trimmed to its transient, optionally pitch-shifted / sequenced with real ffmpeg
+DSP (asetrate/aresample, adelay/amix, afade), peak-normalized, and re-wrapped to
+the canonical WAVE/LEI16/44100/mono container with afconvert. The shipped game
+never runs any build tool; it only loads the finished WAVs.