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Old 09-22-2016, 08:05 AM   #1
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Distortion in recorded audio data using ALSA plugin


While using the ALSA plugin for recording the audio data simultaneously from different mic drivers, it is always getting distortion in the captured file.

step1: start the recording from first driver using "arecord" application with "plugin" for 16Khz to 16Khz sampling rate conversion.

step2: start the recording from second driver using "arecord" application with "plugin" for 48Khz to 16Khz sampling rate conversion.

Result: The recorded data in the second driver have distortion and it is observed that the data is recorded in different sampling rate format.

Please share your valuable comments regarding this problem.
Old 09-24-2016, 11:32 AM   #2
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Audio is recorded in a digital format, but it is not truly data. If the proper gain is not set, the sampling points in the audio stream may be clipped, or laden with noise. If you can set the input gain correctly, I think your problem will be solved.


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