Schema representing a CreateSpeechRequest within the OpenAI API
@type t() :: %ExOpenAI.Components.CreateSpeechRequest{ input: String.t(), model: (:"tts-1-hd" | :"tts-1") | String.t(), response_format: (:pcm | :wav | :flac | :aac | :opus | :mp3) | nil, speed: float() | nil, voice: :shimmer | :nova | :onyx | :fable | :echo | :alloy }