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  • jkoffman's Avatar
    Yesterday, 02:11 AM
    That did it, THANK YOU! Now to continue on breaking my code, but with working hardware... Thank you again!
    4 replies | 108 view(s)
  • jkoffman's Avatar
    Yesterday, 12:47 AM
    To be clear, I don't think anything is unsoldered. The USB cable came out of the connector, that's all. Thanks!
    4 replies | 108 view(s)
  • jkoffman's Avatar
    Yesterday, 12:43 AM
    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 time to plan a...
    4 replies | 108 view(s)
  • jkoffman's Avatar
    06-16-2020, 02:33 AM
    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 do some deeper...
    4 replies | 145 view(s)
  • jkoffman's Avatar
    06-16-2020, 12:45 AM
    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 to 5V. Again, seems...
    4 replies | 145 view(s)
  • jkoffman's Avatar
    06-15-2020, 12:08 AM
    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 from 3.3V. ...
    3 replies | 136 view(s)
  • jkoffman's Avatar
    06-14-2020, 04:12 PM
    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 powered off of 5V, which...
    4 replies | 145 view(s)
  • jkoffman's Avatar
    06-14-2020, 11:30 AM
    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.
    13 replies | 318 view(s)
  • jkoffman's Avatar
    06-14-2020, 03:29 AM
    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 is, the other needs...
    3 replies | 136 view(s)
  • jkoffman's Avatar
    06-13-2020, 09:01 PM
    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 it gives me no audio...
    13 replies | 318 view(s)
  • jkoffman's Avatar
    06-13-2020, 04:51 PM
    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 list. My solution...
    13 replies | 318 view(s)
  • jkoffman's Avatar
    06-13-2020, 04:15 PM
    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 filenames and function...
    13 replies | 318 view(s)
  • jkoffman's Avatar
    06-13-2020, 02:28 PM
    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 SPDIF. That was my...
    13 replies | 318 view(s)
  • jkoffman's Avatar
    06-13-2020, 11:53 AM
    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 create a 16 bit...
    13 replies | 318 view(s)
  • jkoffman's Avatar
    06-12-2020, 08:51 PM
    I would certainly read it! I think there are a few typos to watch out for too.
    4 replies | 126 view(s)
  • jkoffman's Avatar
    06-12-2020, 08:46 PM
    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
    13 replies | 318 view(s)
  • jkoffman's Avatar
    06-12-2020, 08:04 PM
    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 starting at line 549....
    4 replies | 126 view(s)
  • jkoffman's Avatar
    06-12-2020, 03:40 PM
    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 boards via I2S to...
    13 replies | 318 view(s)
  • jkoffman's Avatar
    06-12-2020, 01:57 PM
    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 would be a time where...
    3 replies | 115 view(s)
  • jkoffman's Avatar
    06-12-2020, 11:36 AM
    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 try to figure out...
    3 replies | 115 view(s)
  • jkoffman's Avatar
    06-11-2020, 11:41 PM
    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 to generate the SPDIF...
    2 replies | 91 view(s)
  • jkoffman's Avatar
    06-11-2020, 12:44 PM
    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 avoid noise. Currently I...
    2 replies | 91 view(s)
  • jkoffman's Avatar
    06-11-2020, 03:52 AM
    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.
    4 replies | 138 view(s)
  • jkoffman's Avatar
    06-11-2020, 01:25 AM
    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 working on a Teensy...
    4 replies | 138 view(s)
  • jkoffman's Avatar
    06-10-2020, 08:46 PM
    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 2020 package. I...
    4 replies | 138 view(s)
  • jkoffman's Avatar
    05-23-2020, 01:24 AM
    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 option. Thanks...
    2 replies | 216 view(s)
  • jkoffman's Avatar
    05-22-2020, 02:39 PM
    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, webseries, whatever...
    2 replies | 216 view(s)
  • jkoffman's Avatar
    05-21-2020, 10:34 PM
    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.
    4 replies | 129 view(s)
  • jkoffman's Avatar
    05-21-2020, 09:16 PM
    Interesting, thank you for that!
    4 replies | 129 view(s)
  • jkoffman's Avatar
    05-21-2020, 08:11 PM
    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 it's a 1.8V...
    4 replies | 129 view(s)
  • jkoffman's Avatar
    05-21-2020, 08:05 PM
    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.
    135 replies | 6001 view(s)
  • jkoffman's Avatar
    05-21-2020, 06:45 PM
    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 this on the analog...
    135 replies | 6001 view(s)
  • jkoffman's Avatar
    05-21-2020, 05:11 PM
    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 spot where the errors...
    135 replies | 6001 view(s)
  • jkoffman's Avatar
    05-20-2020, 01:17 AM
    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
    135 replies | 6001 view(s)
  • jkoffman's Avatar
    05-17-2020, 07:32 PM
    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 didn't seem to be...
    135 replies | 6001 view(s)
  • jkoffman's Avatar
    05-17-2020, 03:22 PM
    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 .ini file, but I hope...
    10 replies | 277 view(s)
  • jkoffman's Avatar
    05-16-2020, 10:43 PM
    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 the audio shield. ...
    135 replies | 6001 view(s)
  • jkoffman's Avatar
    05-16-2020, 07:00 PM
    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 trying to add another...
    10 replies | 277 view(s)
  • jkoffman's Avatar
    05-16-2020, 06:54 PM
    Very interesting, I will check it out! Out of curiosity, are you on Windows or Mac?
    10 replies | 277 view(s)
  • jkoffman's Avatar
    05-16-2020, 06:38 PM
    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 Arduino/Teensyduino...
    10 replies | 277 view(s)
  • jkoffman's Avatar
    05-16-2020, 03:23 PM
    Kurt, thank you very much! This should provide a good afternoon's investigation!
    10 replies | 277 view(s)
  • jkoffman's Avatar
    05-16-2020, 01:43 PM
    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 precursor to using...
    10 replies | 277 view(s)
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12-04-2015