feat(core,studio): the character presets pitch shift unlocks (#3277)

Chipmunk, Giant, and Monster ship as presets on the pitchshift worklet
P1 added: Chipmunk pitches up and adds sparkle, Giant pitches down with
weight and a compressor to hold the extra low end together, Monster pitches
down further with saturation growl and a close, tight reverb. Every param
verified against the live effect registry rather than sketched — the
compressor/reverb/saturate/shelf keys all match exactly.

Each gets its own title treatment (font, size, tracking, hue) so the FX
rack's per-preset styling coverage and hue-distance/background-uniqueness
tests extend cleanly to the three new entries, and complaint-line copy in
the non-voice vocabulary the audit test enforces (no speech words — "Giant"
over CapCut's "Deep Voice", as the design doc records).

Updates plans/audio-fx-presets.md's two limits paragraphs to record that
pitch shift landed and this half of the character list now ships; Robot and
Alien stay out of scope (ring modulation, still unbuilt).

Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>

packages/core/src/audioFxCopy.ts

@@ -339,6 +339,9 @@ export const PRESET_PROBLEM: Record<string, string> = {
   "pa-system": "Make it sound like a station announcement",
   intercom: "Make it sound like a door intercom",
   "doofus-worble": "Make it wobble like it is seasick",
+  chipmunk: "Make it small and squeaky",
+  giant: "Make it huge and deep",
+  monster: "Make it a monster",
   "room-tight": "It sounds dry and stuck to the speaker",
   "room-natural": "It should sound like a real place",
   hall: "It should sound far away and big",

packages/core/src/audioFxPresets.ts

@@ -333,6 +333,28 @@ export const HF_AUDIO_FX_PRESETS: readonly HfAudioFxPreset[] = [
       },
     ],
   ),
+  preset("chipmunk", "character", "Chipmunk", "Small, fast and squeaky.", [
+    { type: "pitchshift", label: "Up High", params: { semitones: 7, mix: 1 } },
+    { type: "highshelf", label: "Extra Sparkle", params: { frequency: 4000, gain: 3 } },
+  ]),
+  preset("giant", "character", "Giant", "Huge, slow and deep.", [
+    { type: "pitchshift", label: "Down Low", params: { semitones: -5, mix: 1 } },
+    { type: "lowshelf", label: "Add Weight", params: { frequency: 150, gain: 4 } },
+    {
+      type: "compressor",
+      label: "Hold It Together",
+      params: { threshold: -18, ratio: 3, attack: 10, release: 120, knee: 6, makeup: 2, mix: 1 },
+    },
+  ]),
+  preset("monster", "character", "Monster", "Deep, rough and too close.", [
+    { type: "pitchshift", label: "Down Low", params: { semitones: -8, mix: 1 } },
+    { type: "saturate", label: "Growl", params: { type: "tanh", threshold: -12, output: -1 } },
+    {
+      type: "reverb",
+      label: "Right Behind You",
+      params: { size: 0.3, damping: 0.5, wet: 0.22, dry: 0.85 },
+    },
+  ]),
 
   // ---------------------------------------------------------------- space --
   preset("room-tight", "space", "Tight Room", "A small hard room — presence without wash.", [

packages/studio/src/components/editor/propertyPanelFxPresetStyle.ts

@@ -150,6 +150,24 @@ export const FX_PRESET_STYLE: Record<string, FxPresetStyle> = {
     color: "hsl(288, 85%, 72%)",
     family: FACE.theatrical,
   },
+  // Small, fast and squeaky — tight and bright, nothing about it sits still.
+  chipmunk: {
+    type: "text-[12px] font-black uppercase tracking-tighter",
+    color: "hsl(54, 88%, 66%)",
+    family: FACE.geometric,
+  },
+  // Huge and slow — the biggest size here, set on a face bolted to a monument.
+  giant: {
+    type: "text-[18px] font-black tracking-[0.02em]",
+    color: "hsl(250, 72%, 68%)",
+    family: FACE.engraved,
+  },
+  // Rough and too close — heavy industrial caps, growled rather than shouted.
+  monster: {
+    type: "text-[15px] font-black uppercase tracking-[0.05em]",
+    color: "hsl(350, 78%, 64%)",
+    family: FACE.condensed,
+  },
 
   // --- space: rooms. Light and wide, because that is what space looks like ---
   "room-tight": {

plans/audio-fx-presets.md

@@ -88,7 +88,10 @@ These are ordinary filter + saturation + bitcrush recipes and we can do all of
 them. **The character half of CapCut's list we cannot do**: Chipmunk, Deep
 Voice, Robot, Alien, Monster, Elf — every one of those is pitch, formant or
 ring modulation, and the registry has no pitch shifter, no time-stretch and no
-ring mod. Out of scope unless a new effect is added.
+ring mod. Out of scope unless a new effect is added. **Update (2026-08-14,
+PR #3276/#3277):** a pitch shifter landed, and Chipmunk, Giant, and Monster now
+ship as presets; Robot and Alien are still out of scope (they need ring
+modulation, which the registry still does not have).
 
 ---
 
@@ -112,7 +115,9 @@ Plus two force multipliers the catalog depends on:
 **Hard limits, stated once:** no noise reduction, no de-reverberation, no pitch
 or formant shift, no time-stretch, no spectral repair, no stereo widening
 beyond `chorus`, no true multiband compression (though stacked peaking + a
-`mix`-blended compressor approximates it).
+`mix`-blended compressor approximates it). **Update (2026-08-14, PR
+#3276):** pitch shift landed as a worklet effect — the "no pitch or formant
+shift" limit above is now half-lifted (pitch, still no formant shift).
 
 ---