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  • chipaudette's Avatar
    11-09-2019, 10:24 PM
    Hey, this is super cool! It seems to work well for me on my Teensy 3.6. Thanks for making it happen and for "MTP (Experimental)" getting pulled into the mainline Teensyduino that we all download by default. The...
    79 replies | 28822 view(s)
  • chipaudette's Avatar
    10-17-2019, 09:31 PM
    I want a MIDI shield. MIDI In/Out/Through. Along with the MIDI hardware, the board should have assorted through-hole solder points for attaching analog sensors or whatever. Nothing fancy, just through-holes. Also,...
    52 replies | 1660 view(s)
  • chipaudette's Avatar
    10-14-2019, 07:42 PM
    Or, instead of Tympan, you could consider buying the BC127 module that's available from Sparkfun and wiring it to your Teensy 4.0 + Audio shield. Or you could consider any other BT Audio capable BT module. In the...
    9 replies | 248 view(s)
  • chipaudette's Avatar
    10-14-2019, 07:20 PM
    I think that the Tympan Rev D will do this. The Tympan is aimed at open source hearing aid algorithms, but in reality, it is a general purpose digital audio platform. Full Disclosure: I'm part of the Tympan team....
    9 replies | 248 view(s)
  • chipaudette's Avatar
    10-09-2019, 08:48 PM
    No. But if you can point me to it, I'll learn something! Chip
    147 replies | 15514 view(s)
  • chipaudette's Avatar
    09-25-2019, 12:11 PM
    chipaudette replied to a thread Bat detector in Audio Projects
    Lowpass filtering at Nyquist is not nearly as important for the sigma-delta ADCs used in audio codecs (such as the Teensy Audio board). Try it for yourself...run a frequency sweep into the board, one that extends above...
    531 replies | 38957 view(s)
  • chipaudette's Avatar
    09-24-2019, 04:24 PM
    chipaudette replied to a thread Bat detector in Audio Projects
    Note in my blog post how I show the spectrum of the self noise with and without the HP filter engaged. My two spectra reveal the chacteristics of the noise added by that HP filter: several very strong narrowband peaks....
    531 replies | 38957 view(s)
  • chipaudette's Avatar
    09-24-2019, 04:06 PM
    chipaudette replied to a thread Bat detector in Audio Projects
    If you're curious, I did a self-noise analysis of the Teensy Audio board for a subset of the audible frequency range (not ultrasound)... http://openaudio.blogspot.com/2017/03/teensy-audio-board-self-noise.html Chip
    531 replies | 38957 view(s)
  • chipaudette's Avatar
    09-24-2019, 03:34 PM
    chipaudette replied to a thread Bat detector in Audio Projects
    I love to see people getting quantitative. Fantastic. As some friendly improvements: * The term "signal to noise ratio" (SNR) is typically used instead of "contrast". You define what you consider to be your input...
    531 replies | 38957 view(s)
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About chipaudette

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MTP Responder Contribution 11-09-2019 10:24 PM
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10-18-2015