curl --request POST \
  --url https://api.orcarouter.ai/v1/audio/speech \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "openai/tts-1",
  "input": "<string>",
  "voice": "<string>",
  "instructions": "<string>",
  "speed": 2.125,
  "stream_format": "<string>",
  "response_format": "mp3"
}
'