Function synthesizeWithPlayHT

apps/sim/app/api/tools/tts/unified/route.ts:783–846

(
  params: Partial<PlayHtTtsParams>
)

}

async function synthesizeWithPlayHT(
  params: Partial<PlayHtTtsParams>
): Promise<{ audioBuffer: Buffer; format: string; mimeType: string }> {
  const {
    text,
    apiKey,
    userId,
    voice,
    quality = 'standard',
    outputFormat = 'mp3',
    speed = 1.0,
    temperature,
    voiceGuidance,
    textGuidance,
    sampleRate,
  } = params

  if (!text || !apiKey || !userId) {
    throw new Error('text, apiKey, and userId are required for PlayHT')
  }

  const requestBody: Record<string, unknown> = {
    text,
    quality,
    output_format: outputFormat,
    speed,
  }

  if (voice) requestBody.voice = voice
  if (temperature !== undefined) requestBody.temperature = temperature
  if (voiceGuidance !== undefined) requestBody.voice_guidance = voiceGuidance
  if (textGuidance !== undefined) requestBody.text_guidance = textGuidance
  if (sampleRate) requestBody.sample_rate = sampleRate

  const response = await fetch('https://api.play.ht/api/v2/tts/stream', {
    method: 'POST',
    headers: {
      AUTHORIZATION: apiKey,
      'X-USER-ID': userId,
      'Content-Type': 'application/json',
    },
    body: JSON.stringify(requestBody),
  })

  if (!response.ok) {
    const error = await readTtsErrorJson(response, 'PlayHT TTS error response')
    const errorMessage = getTtsErrorMessage(error, response.statusText)
    throw new Error(`PlayHT TTS API error: ${errorMessage}`)
  }

  const audioBuffer = await readResponseToBufferWithLimit(response, {
    maxBytes: MAX_TTS_AUDIO_BYTES,
    label: 'PlayHT TTS audio response',
  })

  const format = outputFormat || 'mp3'
  const mimeType = getMimeType(format)