catalog(chatterbox): route to /tts, expose emotion levers + sane defaults

Chatterbox was producing poor output because the catalog pointed at the thin
OpenAI /v1/audio/speech endpoint, which exposes none of Resemble's emotion/
pacing knobs — and the devnen server's shipped default exaggeration is 1.3
(tuned for its theatrical demo presets), which over-acts.

Re-point to the wrapper's richer /tts and expose the real control surface
(exaggeration, cfg_weight, temperature, speed_factor, seed, voice_mode),
mirroring the sibling dia stack (same devnen author). Defaults sourced live
2026-06-01: exaggeration + cfg_weight = 0.5 (Resemble README 'works well for
most prompts'), temperature 0.8 / speed 1.0 / seed 0 (server generation_
defaults). The shipped 1.3 exaggeration is deliberately NOT adopted.

Voices: expose the 28 built-in predefined voices via /get_predefined_voices
(default Emily.wav, the server default_voice_id) + clone via /get_reference_
files — replacing the wrong 'OpenAI aliases only' claim. Corrected seedable:
false -> true (/tts has seed) and image_tag_mutable -> true (:latest). Bumped
service version 1 -> 2 (breaking field-shape change); status down -> ready
(live + healthy). catalog_version unchanged (no new field types).

docs/asset-engine/services.yaml

@@ -199,68 +199,185 @@ services:
       renderer ships. Once present, flip to status: ready.
 
   - id: chatterbox
-    name: Chatterbox Turbo TTS
+    name: Chatterbox TTS
     description: >
-      Resemble AI's low-latency English TTS (350M, ~75ms TTFB, 6× realtime).
+      Resemble AI's low-latency English TTS (Chatterbox-Turbo, 350M, ~75ms TTFB,
-      Zero-shot voice cloning from ~5s reference. 9 paralinguistic tags.
+      6× realtime). 28 built-in predefined voices + zero-shot cloning from a
+      5–30s reference. Inline paralinguistic tags, plus Resemble's signature
+      exaggeration / cfg_weight emotion + pacing control.
     category: tts
-    version: 1
+    version: 2
-    status: down
+    status: ready
     host: irv-ml1
     lifecycle:
       stack: chatterbox
       vram_gb: 4
       gpu_device_id: 0
-    endpoint: http://10.100.79.3:8196/v1/audio/speech
+    endpoint: http://10.100.79.3:8196/tts
     method: POST
     content_type: application/json
     model:
       id: ResembleAI/chatterbox-turbo
       revision: null
       image: devnen/Chatterbox-TTS-Server:latest
+    section_groups:
+      - id: basic
+        label: Text & voice
+      - id: sampling
+        label: Expression & sampling
+        hint: Resemble's neutral defaults (exaggeration 0.5 / cfg_weight 0.5). Raise exaggeration or lower cfg_weight for drama.
+      - id: advanced
+        label: Advanced
     fields:
-      - name: input
+      - name: text
         type: textarea
         label: Text (with optional [tags])
+        section: basic
         required: true
         max_length: 5000
         description: >
-          Inline tags: [laugh] [chuckle] [sigh] [gasp] [cough] [clear throat]
+          Inline paralinguistic tags honored by Turbo: [laugh] [chuckle] [sigh]
-          [sniff] [groan] [shush]. Turbo loses base-Chatterbox's exaggeration knob.
+          [gasp] [cough] [clear throat] [sniff] [groan] [shush]. Best results
-      - name: model
+          when a physical tag is paired with surrounding emotional context.
+      - name: voice_mode
         type: select
-        options: [chatterbox-turbo]
+        label: Voice mode
-        default: chatterbox-turbo
+        section: basic
-      - name: voice
+        options: [predefined, clone]
-        type: select
+        default: predefined
-        label: Voice
-        default: alloy
         description: >
-          Built-in OpenAI-compat aliases (alloy, echo, fable, onyx, nova, shimmer).
+          `predefined` -> a built-in voice (predefined_voice_id below).
-          Cloned: 5–15s WAV files in /worktank/chatterbox/reference_audio/.
+          `clone` -> a reference clip (reference_audio_filename). predefined is
-      - name: response_format
+          the out-of-box default; the empty/"undefined" case is avoided by
+          defaulting the voice below.
+      - name: predefined_voice_id
         type: select
-        options: [wav, opus, aac, flac, pcm_s16]
+        label: Voice (built-in)
+        section: basic
+        optional: true
+        default: "Emily.wav"
+        source_url: http://10.100.79.3:8196/get_predefined_voices
+        source_jsonpath: $[*].filename
+        description: >
+          Required when voice_mode=predefined. 28 built-in voices staged in the
+          devnen image (Abigail, Adrian, Alexander, Alice, Austin, Axel, Connor,
+          Cora, Elena, Eli, Emily, Everett, Gabriel, Gianna, Henry, Ian, Jade,
+          Jeremiah, Jordan, Julian, Layla, Leonardo, Michael, Miles, Olivia,
+          Ryan, Taylor, Thomas — each <name>.wav). Default Emily.wav is the
+          server's own default_voice_id. Verified live via /get_predefined_voices.
+      - name: reference_audio_filename
+        type: select
+        label: Voice (clone reference)
+        section: basic
+        optional: true
+        source_url: http://10.100.79.3:8196/get_reference_files
+        source_jsonpath: $[*]
+        description: >
+          Required when voice_mode=clone. 5–30s clean WAV (16 kHz+ mono) under
+          /worktank/chatterbox/reference_audio/; upload via the server's
+          /upload_reference. Match the clip's language to `language` to avoid
+          accent transfer (or set cfg_weight=0).
+      - name: exaggeration
+        type: slider
+        section: sampling
+        min: 0.25
+        max: 2.0
+        step: 0.05
+        default: 0.5
+        description: >
+          Emotional intensity. Resemble's docs: 0.5 "works well for most prompts
+          across all languages"; ~0.7+ for dramatic delivery (which also speeds
+          speech up). NOTE: the devnen server *ships* 1.3 (tuned for its
+          theatrical demo presets) — 0.5 is the general-use value and the catalog
+          default; the shipped 1.3 is the likely cause of over-acted/unstable output.
+      - name: cfg_weight
+        type: slider
+        section: sampling
+        min: 0.0
+        max: 1.0
+        step: 0.05
+        default: 0.5
+        description: >
+          Pacing / prompt adherence (Resemble default 0.5). Lower to ~0.3 to
+          slow delivery, for fast/intense reference speakers, or alongside a
+          raised exaggeration for drama; 0 effectively disables guidance (useful
+          to reduce reference-accent transfer).
+      - name: temperature
+        type: slider
+        section: sampling
+        min: 0.05
+        max: 2.0
+        step: 0.05
+        default: 0.8
+        description: Sampling temperature; lower = steadier. Server + Resemble default 0.8.
+      - name: speed_factor
+        type: slider
+        section: sampling
+        min: 0.5
+        max: 2.0
+        step: 0.05
+        default: 1.0
+        description: Post-hoc playback speed. Server default 1.0.
+      - name: seed
+        type: number
+        section: sampling
+        required: false
+        default: 0
+        description: 0 = random; a fixed integer repeats the same take.
+      - name: output_format
+        type: select
+        section: basic
+        options: [wav, opus, mp3]
         default: wav
-      - name: stream
+        description: 24 kHz. Live-verified enum (wav/opus/mp3).
+      - name: language
+        type: text
+        section: advanced
+        required: false
+        default: en
+        description: >
+          Language override. Base Turbo is English; the multilingual variant
+          (23 languages, via the stack .env) honors other codes. Leave `en`.
+      - name: split_text
         type: bool
-        default: false
+        section: advanced
+        default: true
+        description: Auto-split long text into chunks.
+      - name: chunk_size
+        type: slider
+        section: advanced
+        min: 100
+        max: 1000
+        step: 10
+        default: 120
+        description: Target chunk length in chars when splitting (server default 120).
     response:
       type: audio
-      mime_from_field: response_format
+      mime_from_field: output_format
     reproducibility:
-      seedable: false
+      seedable: true
-      deterministic: true
+      deterministic: false
+      seed_field: seed
       notes: >
-        No seed. Wrapper repo updates ~weekly; pin SHA in .env. PerTh watermark
+        /tts exposes `seed` (0=random); a fixed seed + identical params repeats a
-        unconditionally applied (Resemble policy).
+        take. Temperature-sampled → not guaranteed byte-exact, and Resemble's
+        PerTh watermark is applied unconditionally. (Prior catalog claimed no
+        seed support — corrected against the live OpenAPI 2026-06-01.)
     estimated_latency:
       cold_start_s: 3
       warm_per_unit: "~75ms TTFB, 6× realtime"
     license: MIT
     notes: |
-      Python 3.10 only (wrapper hardcoding).
+      Routes to the devnen wrapper's richer /tts (full control surface:
-      Multilingual variant (23 languages) also available via .env.
+      exaggeration / cfg_weight / temperature / speed_factor / seed / voice_mode)
+      instead of the thin OpenAI /v1/audio/speech, which exposes NONE of the
+      emotion knobs — that omission was why prior output was poor. Same wrapper
+      author as the `dia` stack; identical predefined/clone voice model.
+      Defaults sourced from Resemble's README (exaggeration + cfg_weight = 0.5)
+      and the server's generation_defaults (temperature 0.8, speed 1.0, seed 0),
+      read live 2026-06-01; the server's shipped exaggeration 1.3 is demo-tuned
+      and deliberately NOT adopted. Python 3.10 only (wrapper hardcoding);
+      multilingual (23-language) variant available via the stack .env.
 
   - id: index-tts
     name: IndexTTS-2
@@ -1724,10 +1841,10 @@ reproducibility_audit:
     image_tag_mutable: true
     notes: "Same image as kokoro proper; same mutability story. Response carries timestamps."
   - service: chatterbox
-    seedable: false
+    seedable: true
-    model_deterministic: true
+    model_deterministic: false
-    image_tag_mutable: false
+    image_tag_mutable: true
-    notes: "PerTh watermark unconditional (Resemble policy)."
+    notes: "/tts exposes seed (0=random); temperature-sampled, not byte-exact. PerTh watermark unconditional (Resemble policy). image :latest is mutable — pin a digest/SHA for true repro."
   - service: index-tts
     seedable: false
     model_deterministic: true