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I believe I've identified the culprit - VMWare Fusion was trying to intercept the USB device on plug.

No serial ports available.

This is currently broken for me again, BTW, even with csrutil showing a status of disabled.

I spent several hours installing, deleting, clean installing, etc and this was the only thing that made the serial port show up in Arduino. Not to doubt you, but it did not work for me until I did this and then everything worked perfectly. If there's some kind of diagnostic information you would...

Hello - this isn't so much a question as it is an FYI. If you're using a Teensy on a Mac (or any arduino really) you'll notice that there are no serial ports detected in Arduino 1.6.7 (or 1.6.5). You can't open the serial monitor (except on the worth-little bluetooth serial), and the Audio/FFT...

I suppose the words "total noob" and the absolutely uncertain way I asked the question did not indicate it in full detail but no, I don't know how to use them just because I was able to google for them. In fact I don't even know what the phrase drain source current means, nor what I'd need to do...

I also have a 2N3904 NPN Transistor, would it be possible to use that in a preamplification duty?

Is this what you mean by antiparallel diodes on the input?

I'm not sure what AC coupling means but I'll do some googling. Thanks for your response I'll find a newer op amp.

This is a very interesting library, and that is a great starting point for me, code wise, thank you so much. I'll go read up about this audio library a bit before I embarrass myself with dumb quetions. Thank you Paul.

I understood from the Teensy 3.1 page that all the "normal" analog pins are 5v tolerant but the analog only pins are 3.3v only, though in closer reading I realize it ignores those values between 3.3v and 5v, so that's unideal. I'll sort out the voltage virtual ground. By preamp ground do you...

So when I say FFT understand that I don't really mean FFT, I mean frequency detection, but whenever I approach that subject in various arduino/teensy forums the Fourier-letter word shows up first thing.

Well, the operative thing I'm looking for is repeatable detectability and not accuracy or even musical evaluation, simply raw detection input without real total spectrum analysis. When I play the bells through my computer mic using a mic-oscilloscope plotter I can see strong bars at the...

I've been using 10kohm resistors for both the feedback network values mostly because they're what I had at hand but I'm unable to get consistent "what amplification am I getting here" readings from the op amp (even just using DC input).

My ignorance here is vast but I think I have a project which the Teensy is hyper overkill for (I hope). The basic idea is that a musical instrument (a chime) will be played, the fundamental frequency of the note played is detected (of seven possible input frequencies) and if one is detected an...