fish

type Config struct {
	// APIKey is the Fish Audio API key. Required.
	APIKey string `validate:"required"`
	// BaseURL overrides the API base; empty uses the hosted API.
	BaseURL string
	// Model is the backend model, sent as the "model" request header; empty uses
	// a current default.
	Model string
	// ReferenceID selects a voice model (a library or cloned voice). Recommended;
	// empty uses the model's default voice.
	ReferenceID string
	// SampleRate is the PCM output rate; empty uses 24 kHz. Supported: 8000,
	// 16000, 24000, 32000, 44100.
	SampleRate int
	// Speed scales the speaking rate; nil leaves it at the default.
	Speed *float64
}