| author | ms.service | ms.topic | ms.date | ms.author |
|---|---|---|---|---|
eric-urban |
azure-ai-speech |
include |
9/22/2020 |
eur |
[!INCLUDE Header]
The Speech SDK for Objective-C does not support compressed audio.
The default audio streaming format is WAV (16 kHz or 8 kHz, 16-bit, and mono PCM). To input a compressed audio file (such as mp3), you must first convert it to a WAV file in the default input format. To stream compressed audio, you must first decode the audio buffers to the default input format. For more information, see How to use the audio input stream.