Text to Speech Stream with Timestamps

Inline voice references for zero-shot cloning. Requires MessagePack (not JSON). For single speaker, provide an array of ReferenceAudio objects. For multiple speakers, provide an array of arrays where each inner array contains references for one speaker. Multi-speaker is available with the S2 family (s2-pro, s2.1-pro, s2.1-pro-free) and drama-3, not s1. The speaker index corresponds to the index in reference_id array. Example for multi-speaker: [[{audio, text}], [{audio, text}, {audio, text}]] for 2 speakers where speaker 1 has 2 reference samples.

Voice model ID(s) from Fish Audio library or your custom models. For single-speaker synthesis, provide a string. For multi-speaker synthesis (dialogue), provide an array of model IDs. Multi-speaker is available with the S2 family (s2-pro, s2.1-pro, s2.1-pro-free) and drama-3, not s1. When using multiple speakers, use speaker tags in your text like <|speaker:0|> and <|speaker:1|> to indicate speaker changes. Example: <|speaker:0|>Hello!<|speaker:1|>Hi there!<|speaker:0|>How are you? with reference_id: ["speaker-a-id", "speaker-b-id"].

Optional list of up to 3 pronunciation dictionaries to apply during synthesis. Provide either references to platform-managed dictionaries OR inline literal dictionaries (the two forms are mutually exclusive in a single request). The server resolves and merges the dictionaries, then forwards the full merged dictionary to the inference engine, which performs the substitution. Matching is plain substring matching, leftmost-longest, and case-insensitive unless an entry sets case_sensitive. Missing or unresolvable references are silently dropped — the request still succeeds. Use application/json or application/msgpack content-type; nested arrays are not representable in multipart/form-data.