Output from audioTest program

The plot below shows a recording of the output from the audioTest program. The recording was made using Matlab and the audio data and its FFT plotted. The signal was a single tone of 2640Hz.

audioOutputThe data is clean and noise free. Changing the frequency makes little difference to the results; at 10kHz the plot is no longer smooth, but the FFT is clean.

audioOutput10k

 

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