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  • chipaudette's Avatar
    Today, 04:54 PM
    I, too, have seem massive variation in write times to the SD card. It seems to depend a lot on the SD card itself. It is also affected by how they are formatted. So, after a bunch of experiments with my T3.6 back...
    8 replies | 134 view(s)
  • chipaudette's Avatar
    10-17-2020, 11:16 PM
    I love how the Audio library lets you see what fraction of the processor is being consumed by different blocks in your audio processing chain. But, in looking at the formula, I don't understand how the calculation is...
    1 replies | 199 view(s)
  • chipaudette's Avatar
    09-21-2020, 05:37 PM
    The OpenAudio library is a collaboration between me and Bob Larkin. Since I don't recognize the file "DSP_Teensyduino_32.h", I'm assuming that it's something that Bob added. If it fails to compile with the #include...
    7 replies | 432 view(s)
  • chipaudette's Avatar
    09-20-2020, 12:47 PM
    Formant shifting and pitch shifting are indeed different things. My links are for formant shifters that work in the frequency domain. They move the amplitude of the FFT bins up or down but leave the FFT phase values...
    7 replies | 432 view(s)
  • chipaudette's Avatar
    09-16-2020, 12:51 AM
    Moving all the formants up and down isn't particularly difficult...if you've already got a frequency-domain processing algorithm stack going. Getting the round trip FFT/IFFT processing needed to into and out of the...
    7 replies | 432 view(s)
  • chipaudette's Avatar
    09-02-2020, 08:15 PM
    If you're going to try to implement frequency-domain noise reduction, be aware that the Teensy 3.2 will probably not be fast enough to do a round-trip FFT->IFFT in order to do the frequency-domain processing. Even if...
    4 replies | 339 view(s)
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Getting the best performance with SD cards and the audio library Today 04:54 PM
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