from typing import Literal TTSModels = Literal[ "lightning_v3.1", "lightning_v3.1_pro", ] TTSEncoding = Literal[ "pcm", "mp3", "wav", "ulaw", "alaw", ] STTModels = Literal["pulse"] STTEncoding = Literal[ "linear16", "linear32", "alaw", "mulaw", "opus", "ogg_opus", ]