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    That did it, THANK YOU! Now to continue on...

    That did it, THANK YOU!

    Now to continue on breaking my code, but with working hardware...

    Thank you again!
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    To be clear, I don't think anything is...

    To be clear, I don't think anything is unsoldered. The USB cable came out of the connector, that's all.

    Thanks!
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    Dead Teensy 3.2

    Hi all,

    I was just in the middle of uploading some code to a Teensy 3.2 when the cable came loose. The unit no longer seems to show up in Windows or OSX.

    Any chance of reviving this, or is it...
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    Ok, thank you for confirming my understanding. ...

    Ok, thank you for confirming my understanding.

    Interestingly, the Adafruit module uses 10K pullups. I'll stick with 2.2K, it's what Paul uses on the audio board. Thank you for the app note, I'll...
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    Ah of course, I wasn't thinking of that. Thank...

    Ah of course, I wasn't thinking of that. Thank you for the reminder!

    I've been testing with one of the Adafruit Mini 0.8" matricies (https://www.adafruit.com/product/870). This board has pullups...
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    Hi Morgan, thanks for the reply. Yep, you've...

    Hi Morgan, thanks for the reply.

    Yep, you've got the scenario right. The 5V side has a seven segment display and some indicator LEDs, but no analog. Any analog is on the audio board and thus run...
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    Audio Board I2C Voltage Shift?

    Hi all,

    I have a small test setup with a Teensy 3.2, and audio board, and an HT16K33 based LED matrix. Everything is connected via I2C, and it works great. I just realized that the matrix is...
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    It's on my list to try. I hadn't done it since I...

    It's on my list to try. I hadn't done it since I wasn't sure if there was a technical reason Paul hadn't done it officially.
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    Power Sharing Between Two Sources

    Hi all,

    I am working on a project with two Teensys. In regular operation either or both of them will have power coming through their USB ports. If only one is powered, regardless of which one it...
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    Well, I had a look. As of August 2015, all of...

    Well, I had a look. As of August 2015, all of those values were 15 in output_i2s.cpp, including I2S_RCR5_FBT. The rest of the settings appear the same I believe. I tried going back to 15 on FBT but...
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    Ah, great idea. I will check that out this...

    Ah, great idea. I will check that out this afternoon!

    Is there a technical reason that i2s_quad hasn't gone to a ratio of 64 yet on the 3.x series? Or is it just that it's lower on the priority...
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    I might have gotten it! I've been messing around...

    I might have gotten it! I've been messing around with this, doing some reading of the datasheet, etc.

    I started by creating copies of output_i2s and input_i2s .cpp and .h files. I modified the...
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    Hi Paul, thanks for weighing in! Yes,...

    Hi Paul, thanks for weighing in!

    Yes, ultimately there will be 4 channels transmitted, two to an audio board, two to the second Teensy.

    Once I get the Teensy 4.0s I ordered, I might switch to...
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    Aha, that was it! Thank you for the help! ...

    Aha, that was it! Thank you for the help!

    Unfortunately this probably means I can't use this transport. The sender Teensy will also be connected to an audio board.

    I wonder if it's possible to...
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    I would certainly read it! I think there are a...

    I would certainly read it! I think there are a few typos to watch out for too.
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    For those curious, this is what it sounds like on...

    For those curious, this is what it sounds like on the receiving computer:

    https://www.dropbox.com/s/acly169w8jdckn1/Input%20Device%20Recording%2020200612%201618.mp3?dl=0
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    While not formatted as traditional documentation,...

    While not formatted as traditional documentation, all the sidebar info is contained within the gui index.html file.

    Check out: https://github.com/PaulStoffregen/Audio/blob/master/gui/index.html...
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    Connecting Two Teensys via I2S

    Starting a new thread for this. Since my experiments switching to a T4.0 went awry (posted elsewhere), while I wait for more parts to arrive I decided to experiment with connecting two Teensy 3.2...
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    Hi Kurt, Awesome, thank you for the info, I'm...

    Hi Kurt,

    Awesome, thank you for the info, I'm glad to know they are safe and that they work. One of my concerns was that perhaps if the voltage regulator on the Teensy was slow to start up there...
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    Killed my first Teensy! Now, why...

    Hi all,

    Well, I finally killed my first Teensy. Sadly it was a 4.0, and while I have a bunch of 3.2 on hand, I am now waiting for more 4.0 to continue my project.

    While I'm waiting, I'd like to...
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    Thanks for the reply! I did look at your thread...

    Thanks for the reply! I did look at your thread earlier, but thank you for the reminder. Unfortunately I'm trying to do something a bit different in that I'm trying to use the on chip I2S interface...
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    Teensy 3.2 SPDIF and I2S

    Hi all,

    For one of the projects I am working on I need to connect to two computers via USB, one for input, one for output. I'd like to transfer the signal between the two Teensys digitally to...
  23. Answering my own question, it does work! I did...

    Answering my own question, it does work!

    I did have a bunch of weird issues but it turned out I had a loose wire. Ahem....oops.
  24. Thanks for the replies! I am looking at...

    Thanks for the replies! I am looking at WS2812Serial now, and I hope to do some experimenting soon. I thought I remembered hearing something about a sort of OctoWS2811 "light". For the moment I'm...
  25. Best WS2812 Library to use with Audio Library

    Hi all,

    I have a project that uses the audio library to do a bunch of mixing, routing, and analysis. I'd like to use some pretty neat WS2812 LEDs as indicators, since I just discovered them in the...
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    Thank you for the suggestion, I will check it...

    Thank you for the suggestion, I will check it out! A physical book might have to wait awhile, I'm stuck in another country for the the foreseeable future which is why I'm hoping to find a good online...
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    C++ Course/Tutorial

    Hi all,

    While I am ok at general C programming, I am realizing that my c++ knowledge is not stellar. I need to get better at classes in particular.

    Has anyone come across a tutorial, course,...
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    Hah, I was wondering about that too! Given that...

    Hah, I was wondering about that too! Given that the voltage range is different for that vs the VDDIO, I can't imagine what would happen if you didn't power it.
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    Interesting, thank you for that!

    Interesting, thank you for that!
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    Audio Board Voltage Regulator?

    Hi all,

    I happened to be looking at the schematic for the audio board and got curious about the voltage regulator. I had a look at one of the ones I have handy and based on the markings I believe...
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    I'd be very curious to see if the Sync I/O worked...

    I'd be very curious to see if the Sync I/O worked ok and the audio file didn't. Maybe that could help narrow down where this problem is creeping in.
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    vjmuzik - I'd love to see if you're seeing...

    vjmuzik - I'd love to see if you're seeing similar results to what I am. If the link above to the file I am using to test doesn't work for some reason, just let me know.

    Just to recap, I am seeing...
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    Just a further note, I went back to my T3.2 setup...

    Just a further note, I went back to my T3.2 setup and tried the ADC input. I'm seeing more glitches there, even a few quadruples! I played with input level a bit, and there does seem to be a sweet...
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    Hi Frank, Just had a minute to solder up a T4...

    Hi Frank,

    Just had a minute to solder up a T4 with an audio shield and test. I'm seeing similar results over line in:

    01:02:05.19
    01:02:05.21
    01:02:05.22
    02:04:10.01
    01:02:05.24
    01:02:06.01
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    Hi Frank, I will check it out. I just got some...

    Hi Frank,

    I will check it out. I just got some new T4 in so I should be able to try them at some point.

    I had thought about adding a plausibility check and just not displaying the frame if it...
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    I had a quick look at it last night and realized...

    I had a quick look at it last night and realized I definitely need to dig deeper because it looks very capable. I don't fully understand yet how to configure the Teensy (other than I know it's the...
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    Hi Frank, I've been doing a bunch of testing...

    Hi Frank,

    I've been doing a bunch of testing with the LTC library, and I've noticed something. It works perfectly when playing audio over USB. But...less so when playing audio in via Line In on...
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    Got it. I bought a new machine before all this...

    Got it. I bought a new machine before all this craziness started, so I'm on Catalina. So far it's been doing ok. I need to update to the latest Teensyduino though! I should probably do that before...
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    Very interesting, I will check it out! Out of...

    Very interesting, I will check it out! Out of curiosity, are you on Windows or Mac?
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    Part of what I don't understand about PlatformIO...

    Part of what I don't understand about PlatformIO is that from what I read it appears to replace the Arduino toolset, which would also mean by passing Teensyduino. Or does it hook into the...
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    Kurt, thank you very much! This should provide a...

    Kurt, thank you very much! This should provide a good afternoon's investigation!
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    Alternative IDE Options

    Hi all,

    I'm missing features on some of my other IDEs in the stock Arduino IDE. I'm on a Mac.

    I know there has been discussion about getting CLI support working, and I'm assuming this is a...
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    I haven't, but I'm currently looking for a 3d...

    I haven't, but I'm currently looking for a 3d model for the audio board as well for use in Fusion 360. Step, STL, whatever is around I'd be interested!

    Thank you!
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    In my attempt to simplify what I'm doing, I...

    In my attempt to simplify what I'm doing, I haven't fully explained the issue. The better analogy would be that I'm making a phase reverse. So it's two sources, and two destinations. sometimes I want...
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    Interesting. I will do some experiments to see if...

    Interesting. I will do some experiments to see if I am allowed to have two connections that technically conflict, but aren't both active at the same time.




    That's my plan. I do have a bit...
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    Hi Andy, thank you for the reply! I understand...

    Hi Andy, thank you for the reply!

    I understand what you're doing on a basic level, but I'm not that experienced with c++ so I'll need to study it a bit further.

    In my case, I want to basically...
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    Dynamic Audio Connections

    Hi all,

    Since my mixer object is a bit stalled for the moment, I'm looking to try out dynamically changeable connections to accomplish some of what I was going for. I know this is possible, I'm...
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    Hi folks, Well, it's been a couple of days,...

    Hi folks,

    Well, it's been a couple of days, and I'm still banging my head against the wall. I did a deep dive on the forum archives and did find a few things that helped (ie I can now put sound...
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    I have reduced the code complexity to try to deal...

    I have reduced the code complexity to try to deal with the crackling issue. I've basically removed the second channel, and hard coded the amplification level to unity gain. Still the same crackling....
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    Hi folks, With an overabundance of sudden free...

    Hi folks,

    With an overabundance of sudden free time, I'm now working on this again. For those catching up I have started with the generic 4 in, 1 out mixer and tried to add a second channel to it....
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