9.4 Audio Recording

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To record audio from the microphone we can use the powerful graphical audacity or the simple command line application arecord.

For the command line arecord simply provide a file name into which the recording will be saved. Start speaking and then type Ctrl-C to terminate the recording.

arecord myrecording.wav

To improve recordings from the computer’s microphone it is recommended to provide the command line option -f S16_LE, which specifies an audio format known as Signed 16 bit Little Endian, which thus uses a higher resolution of 16 bit sampling rather than the default 8 bit sampling.

arecord -f S16_LE myrecording.wav

To transcribe the recording to text see transcribe.



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