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Signal Processing

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    $\begingroup$ What type of data are you using in your testing (is it mic input only?) ? You could try by feeding 0 - Fs/2 sweep signal (constant amplitude) from file? $\endgroup$ Commented May 2, 2024 at 7:00
  • $\begingroup$ So the microphone produces 44.1kHz, 16-bit audio. I suppose I could re-jigger it to run off an imported sound file, but that's not really the use-case for the final implementation. I played some opera with sopranos singing VERY high notes and still only my bottom quarter of bins (0-255) showed any movement. $\endgroup$ Commented May 2, 2024 at 12:28
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    $\begingroup$ Use sweep etc. generated audio signal for testing purposes ... . Soprano goes little above 1kHz (+ few harmonics) so, if bins in your implementation covers whole frequency range (0 - 22.05kHz @ 44.1kHz sampling) you sure understand that using vocals in testing your software is not the best practice. $\endgroup$ Commented May 2, 2024 at 14:58
  • $\begingroup$ Point taken. I'm playing a little fast and loose as this is just for a simple animation, not a scientifically or statistically valid analysis of a waveform. $\endgroup$ Commented May 2, 2024 at 16:18
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    $\begingroup$ You can prepare such constant amplitude sweep (chirp) signal file with Audacity. $\endgroup$ Commented May 2, 2024 at 18:19