/**
 * Audible cues + the iOS/Safari speech unlock — the browser-audio side effects the voice
 * hook fires, with none of its state.
 *
 * These were module-level functions inside `use-voice.ts`: they close over nothing from the
 * hook, take primitives, and touch only WebAudio / SpeechSynthesis. That makes them the one
 * part of that file with a genuinely narrow seam, so they live here instead of in front of
 * the orchestration a reader is actually trying to follow.
 *
 * All of them swallow their own errors. A cue is feedback, never a step in a turn — a locked
 * tab or an unsupported engine must degrade to "no sound", never to a thrown exception that
 * aborts the mic open or the send that was about to happen.
 */
/**
 * The "mic is live again" cue (#152). Unmuting by VOICE has no visual gesture behind it —
 * the user is not looking at the screen, which is the whole point of hands-free — so a
 * confirmation they can HEAR is the only signal that the command landed. Synthesised with
 * WebAudio rather than an asset so it ships with the SDK and needs no network fetch.
 *
 * Deliberately short and quiet: it fires immediately before the mic opens, and anything
 * longer would be captured as the start of the user's own turn.
 */
export declare function playStartCue(): void;
/**
 * Unlock browser Text-to-Speech synchronously inside a user gesture. iOS/Safari
 * won't speak an utterance that's queued LATER (e.g. an async agent reply) unless
 * SpeechSynthesis was first invoked during a real tap — this is the "replied in text
 * but not voice" cause. Speaking an empty utterance on the toggle primes it.
 */
export declare function unlockSpeechSynthesis(): void;
export declare function getAudioCtx(): AudioContext;
/** Rising two-tone: "your turn" — the mic just opened. */
export declare function playListeningChime(): void;
/** Falling two-tone: "got it" — the turn was sent, the agent is thinking. */
export declare function playThinkingChime(): void;
//# sourceMappingURL=cues.d.ts.map