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fix(tts): back to fast Piper controllers, classroom voice setting

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Kokoro-82M generates several times slower than Piper — since the controller
pool moved onto it, every ATC reply arrived seconds late. Controllers return
to distinct Piper speakers with the standard US voice (ryan) as the product
default, so replies are fast again and the default sounds like before.

The classroom gets an instructor-voice setting: standard US voice by default,
'random per module' (stable instructor per module), or one of ten named
US/GB voices.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
itsrubberduck
2026-07-19 12:36:19 +02:00
parent f03355daff
commit 4f367a67aa
5 changed files with 139 additions and 28 deletions
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42
shared/utils/voicePool.ts
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@@ -112,3 +112,45 @@ export function transmissionSpeed(baseSpeed: number, rng: () => number = Math.ra
const jitter = (rng() * 2 - 1) * 0.05
return Math.round((baseSpeed + jitter) * 100) / 100
}
/**
* Selectable classroom instructor voices. The instructor is a single voice
* (not a live position), so it may draw from any pool voice. Labels/accents
* mirror the Speaches mapping in server/utils/voiceRegistry.ts.
*/
export type ClassroomVoiceOption = {
id: string
label: string
accent: 'US' | 'GB'
gender: 'male' | 'female'
}
export const CLASSROOM_VOICE_OPTIONS: readonly ClassroomVoiceOption[] = [
{ id: 'alloy', label: 'Ryan', accent: 'US', gender: 'male' },
{ id: 'onyx', label: 'John', accent: 'US', gender: 'male' },
{ id: 'coral', label: 'Joe', accent: 'US', gender: 'male' },
{ id: 'nova', label: 'Bryce', accent: 'US', gender: 'male' },
{ id: 'fable', label: 'Amy', accent: 'US', gender: 'female' },
{ id: 'shimmer', label: 'Kristin', accent: 'US', gender: 'female' },
{ id: 'sage', label: 'Hannah', accent: 'US', gender: 'female' },
{ id: 'echo', label: 'Jenny', accent: 'GB', gender: 'female' },
{ id: 'ash', label: 'Alan', accent: 'GB', gender: 'male' },
{ id: 'ballad', label: 'Alba', accent: 'GB', gender: 'female' },
]
/** Default classroom instructor voice — the standard US speaker (Ryan). */
export const CLASSROOM_DEFAULT_VOICE = 'alloy'
/** Settings sentinel: pick a stable random voice per module instead of one fixed voice. */
export const CLASSROOM_RANDOM_VOICE = 'random'
const CLASSROOM_VOICE_POOL: readonly string[] = CLASSROOM_VOICE_OPTIONS.map(o => o.id)
/**
* A stable random classroom instructor voice for `key` (e.g. a module id),
* drawn from every selectable classroom voice — one instructor per lesson,
* consistent while it lasts.
*/
export function classroomVoiceFor(key: string): string {
return voiceFromPool(key, CLASSROOM_VOICE_POOL, [])
}