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    Stella - The Electronic Trumpet!

    This has been a long time coming!

    I'm nearing completion of Stella, an electronic trumpet I've been working on with a team from Boston University.

    The instrument lets trumpet players control...
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    I feel a little silly! I dowloaded the newest...

    I feel a little silly!

    I dowloaded the newest versions of Arduino and Teensyduino and Auto Reboot works just fine now. I'll report back if the issue pops up again.

    Thanks defragster and Frank!
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    Auto Reboot not working

    Hello all,

    I am using a Teensy 3.2 with Arduino 1.6.12 and Teensy Loader 1.26.

    When uploading the basic blink program, and with Automatic Mode turned on in Teensy Loader, I still get the...
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    Thanks guys, I'll try out some different mics....

    Thanks guys, I'll try out some different mics. I'll be looking for ones that are stiffer.

    If that doesn't work, I'll try to damp the sound from the mouthpiece so the signal is weaker when it...
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    Great, thanks to both of you, that solved the...

    Great, thanks to both of you, that solved the issue (though, of course, opened another).

    Changing the type of "audio" to 16 bit removed the gaps. I didn't know int was 32 bits with Teensy. And Bob...
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    Issues reading audio queue

    Hey everyone.

    I'm still working on my electronic trumpet project, in which I'm reading audio data from a buzzed trumpet mouthpiece.

    I'm trying to view the audio waveform coming form my mic in...
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    I'm definitely getting some bouncing data, but I...

    I'm definitely getting some bouncing data, but I believe they are easily differentiated from the relevant data by an order of magnitude.

    This can be shown with the image below. Each number...
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    Thanks oddson, that was useful. I implemented...

    Thanks oddson, that was useful.

    I implemented your method, but I soon realized that the time between the unintended button valve presses can be upwards of 50 ms, which is approaching the fastest...
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    Pushbuttons as Trumpet Valves

    Hey all,

    I'm in the process of building an electronic trumpet to give trumpet players more freedom of expression in the electronic realm. I've run into a bit of an issue when trying to use three...
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    DerekR, that looks very useful! And I like the...

    DerekR, that looks very useful! And I like the "eureka!" tone of your post, even if you did reinvent the wheel. :)

    I'll parse your work ASAP.
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    Thanks again for the help, I've successfully...

    Thanks again for the help, I've successfully decimated now.

    For posterity, the issue was solely an error in buffer sizing. I just talked myself through the number of bytes in each buffer and how...
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    Davidelvig - I'm also looking into this topic in...

    Davidelvig - I'm also looking into this topic in order to detect pitches from a trumpet mouthpiece! Coincidence?

    I'll have more to contribute to the technical side of the conversation once my...
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    I'm going to bring this topic back up again, as...

    I'm going to bring this topic back up again, as I'm trying to understand the analyze_fft1024 code for a musical project of my own.

    In analyze_fft1024.h, we see, under the "private" section, that...
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    Thanks Derek, that's much appreciated. I put...

    Thanks Derek, that's much appreciated.

    I put in the two initializing functions, and the errors have disappeared. However, I'm still not getting anything out of my serial moniter!

    Do I need to...
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    Hey everyone! I'm trying to implement Paul's...

    Hey everyone!

    I'm trying to implement Paul's second suggestion in post #3 of this thread, except with a decimation of two. I've filtered the incoming data well enough, but I'm having trouble using...
  16. Makes sense! Just bought the kit, I'll report...

    Makes sense!

    Just bought the kit, I'll report back if necessary.

    Hopefully the issue was with the hardware and not the software. I guess it was a bad chip?
  17. I'm having my EE friend look over my setup today,...

    I'm having my EE friend look over my setup today, but if he can find no error, I think I'll do just that!

    Luckily I have a grant for this project so money isn't a huge problem.

    I have to ask...
  18. Neither of these suggestions seemed to work,...

    Neither of these suggestions seemed to work, unfortunately! But thanks for helping out.

    I'm certainly reading voltage directly from the mic when it's plugged in - around 2-3 mV AC when I yell...
  19. Yep, that checks out. 7666

    Yep, that checks out.

    7666
  20. Still nothing! With this code, I should be...

    Still nothing!

    With this code, I should be able to send audio through linein and hear audio through lineout and headphones, right? I'm asking you to check because I still haven't developed the...
  21. I've cleaned up my soldering job: 7636 But...

    I've cleaned up my soldering job:

    7636

    But nothing changed!

    So I've tried a few things:

    1. Passed a 440 Hz sine wave into the line in of the audio board. The voltage certainly made it to...
  22. Yes, I'll certainly resolder the worse...

    Yes, I'll certainly resolder the worse connections and see if anything changes.
  23. No example gives an audio output at the headphone...

    No example gives an audio output at the headphone jack, and I don't have an SD card on hand, although I suppose I could purchase/find one.

    I do have an outline for the project, although the...
  24. I've spent the day looking into this issue, to no...

    I've spent the day looking into this issue, to no avail. Unfortunately I've been unable to check voltages along the signal path or check if my mics work as I've spent my time learning fundamental...
  25. Can't get audio signal from mic on Audio Board (w/ Teensy 3.2)

    Hey everyone! I'm new to using PJRC products, and honestly new to seriously meddling with electronics as well. I'll try to keep this post as detailed and informative as possible.

    I've recently...
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