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  1. I eked out a little bit more flexibility by using...

    I eked out a little bit more flexibility by using a coroutine library. I didn't want to try and implement a fully fledged RTOS or multi-threading just yet, but now I'm at least able to push...
  2. I think Problem #2 is actually not...

    I think Problem #2 is actually not display-related. It has to do with changing the step length while the sequencer is running, not sure why it freaks out though. I may just not allow the tempo to be...
  3. Thanks -- I'm not familiar with DMA, but on...

    Thanks -- I'm not familiar with DMA, but on reading about it, looks like it may work for what I need. Just not really sure how to exactly implement it. The examples in KurtE's ILI9341 repository seem...
  4. USB MIDI clock jitter with ILI9341 display calls -- use two Teensys?

    Background:

    I'm using the Teensy 4.1 to build a MIDI program change sequencer/orchestrator. I wanted a device that acts as the main clock source for various MIDI instruments, and I wanted a device...
  5. Oh, actually an out_of_range exception is thrown...

    Oh, actually an out_of_range exception is thrown when using the vector .at() method: http://www.cplusplus.com/reference/stdexcept/out_of_range/
  6. I've run into array index errors, where trying to...

    I've run into array index errors, where trying to access an undefined vector index causes a crash. Coming from the web development world myself -- is there a way to "catch" exceptions like that? I...
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    SOLVED: Had to use the MIDIDevice_BigBuffer class...

    SOLVED: Had to use the MIDIDevice_BigBuffer class instead of the MIDIDevice class, as the instruments have a max packet size of 512, and the MIDIDevice class is capped at 64. The conclusion at this...
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    My suspicion is that the two instruments I'm...

    My suspicion is that the two instruments I'm trying to connect over USB to the Teensy have drivers which the Teensy can't make sense of.

    Here's the latest debug output using both devices connected...
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    Are you referring to this sketch...

    Are you referring to this sketch? If so, that's the one I started from.
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    Looked at some other threads, and saw there was a...

    Looked at some other threads, and saw there was a line I could uncomment (#define USBHOST_PRINT_DEBUG) to have the Serial monitor spit out some debug info, here's what it printed out after starting...
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    Trouble with USB host MIDI devices

    Hi,

    I have a couple of hardware instruments (synthesizer, drum machine) which have bi-directional USB MIDI, and I'm having trouble connecting them to a Teensy 4.1 using the USB host library. I...
  12. Thanks so much for the reply with helpful info,...

    Thanks so much for the reply with helpful info, that sort of low level explanation as to how it works under the hood was more what I was after.



    Absolutely, and honestly apologies for posting...
  13. Noob question: Measuring Teensy 4.1 CPU and RAM utilization

    I'm an artist who fell into software engineering who also fell into hardware tinkering, so please forgive my ignorance here, but how would I go about logging the specific load on the Teensy 4.1's CPU...
  14. 909 drum machine using realtime dynamic sample selection?

    Hi, I've been tinkering with using a Teensy 4.1 with the audio shield to try and emulate a TR-909 drum machine. See my post demoing an early prototype here.

    I've been trying to use the Teensy...
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    @Davidelvig - I am not planning on using the ADCs...

    @Davidelvig - I am not planning on using the ADCs through the Audio Shield, but rather through the Teensy's I2C pins. I'm pretty sure the Audio Library will work without the Audio Shield, and the...
  16. Awesome project, wolke! Seems like you're really...

    Awesome project, wolke! Seems like you're really able to get rid of any audible latency, great job!

    Yeah, I would probably try to use the yin based detection then.

    I'm still not sure, from a...
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    Looks great! Just a side note to re-iterate: I...

    Looks great!

    Just a side note to re-iterate: I think 2 of these multichannel ADC boards (please see linked multi-channel ADC board from Adafruit) would provide the 6 digitized signals for...
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    I was thinking that I could go with two of the...

    I was thinking that I could go with two of the ADS1015 boards for 8 ADC channels total, I would just need 2 I2C connections which I think the Teensy 3.6 can handle. The ADS1015 also has a...
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    I was thinking it would fit nicely with the...

    I was thinking it would fit nicely with the project I'm planning, which is to put an embedded poly synthesizer (Teensy based) inside the body of an electric guitar so I don't need to connect to a...
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    Will this board have a standard 5 DIN midi input?

    Will this board have a standard 5 DIN midi input?
  21. Blackaddr, please see the following image that I...

    Blackaddr, please see the following image that I made with Fritzing which details my thought process on this and how I think it might work (from an off-the-shelf / prototyping standpoint) -- I'm sure...
  22. Thanks -- though the Teensy would be outputting...

    Thanks -- though the Teensy would be outputting audio as well when using it as a synthesizer or for applying effects to either the guitar's or synth's signal -- but I do not need to *reproduce* the 6...
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    Thanks Blackaddr, moved the discussion here: ...

    Thanks Blackaddr, moved the discussion here:

    https://forum.pjrc.com/threads/46517-Hexaphonic-(6-discrete-channels)-passive-guitar-pickup-for-pitch-detection?
  24. Hexaphonic (6 discrete channels) passive guitar pickup for pitch detection

    I was interested in the idea of integrating a teensy directly into the body of an electric guitar, where I could use 6 analog signals from a divided pickup (like this...
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    * Moved discussion to thread here: ...

    *

    Moved discussion to thread here:

    https://forum.pjrc.com/threads/46517-Hexaphonic-(6-discrete-channels)-passive-guitar-pickup-for-pitch-detection?

    *
  26. Woohoo!! I actually was able to get it to work...

    Woohoo!! I actually was able to get it to work using a custom descriptor!!!

    Thanks again!
  27. Paul, I did find a document that I think would...

    Paul, I did find a document that I think would provide a descriptor that could be used. It's included in some Microsoft documentation, the link is here. Also, here is an example that might be...
  28. Welp, I borrowed a MacBook Air and tried running...

    Welp, I borrowed a MacBook Air and tried running a version of USB Prober I found on the web, but it doesn't work for the current operating system (macOS Sierra 10.12.x).
  29. True! :) I'm kicking myself for selling my...

    True! :)

    I'm kicking myself for selling my MacBook recently. I will try and borrow a Mac or see if a Mac user can help me out.
  30. Thanks Paul. I've been trying to capture the USB...

    Thanks Paul. I've been trying to capture the USB descriptors using the USBlyzer tool for Windows, but I'm not getting the information I need, and I think the Wacom Tablet maybe obfuscates or has some...
  31. Pen/stylus digitizer HID descriptor feature needed

    Hi, I need to emulate a pressure-sensitive drawing tablet, like a Wacom Intuos Pro. If it's just an experimental commit or branch to the core GitHub repository, I can utilize it that way, I don't...
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    - deleted.
  33. Stylus/Pen Digitizer Emulator - with pressure sensitivity?

    - deleted.
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