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Alexa voice service audio sample pre-processing

Dear All,

(this is a follow-up of https://forums.developer.amazon.com/questions/30898/alexa-voice-service-audio-sample-quality.html)

Question : Which is the PCM pre-processing allowed (signal processing operations) ?

For example: which is the acceptable digital level range ? which is the expected flatness of the frequency response of my microphone ? which is the expected amount of maximum noise and distortion ? Does an automatic gain control is allowed ? Can we design a pre-processing noise canceller ?

Best regards, Laurent.

alexa voice serviceaudio
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swasey@amazon avatar image swasey@amazon commented ·

Laurent, please use the previous forum post to track your answer. The question is still pending internally waiting for an answer.

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