What should you recommend?

You are designing a real-time speech-to-text AI feature for an Android mobile app. The feature will stream data to the Speech service.

You need to recommend which audio format to use to serialize the audio. The solution must minimize the amount of data transferred to the cloud.

What should you recommend?
A . MP3
B . WAV/PCM
C . MP4a

Answer: B

Explanation:

Currently, only the following configuration is supported: Audio samples in PCM format, one channel, 16 bits per sample, 8000 or 16000 samples per second (16000 or 32000 bytes per second), two block align (16 bit including padding for a sample).

Reference: https://docs.microsoft.com/en-us/azure/cognitive-services/speech-service/how-to-use-audio-input-streams