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  • kd9kck's Avatar
    08-11-2020, 08:53 PM
    I am using it for software control of a radio. (Basically a COM port pass thru bridge.) But I also will be need to call the Serial.dtr() function which I don't think a USB HID would have. I am using the teensy...
    7 replies | 263 view(s)
  • kd9kck's Avatar
    08-11-2020, 07:42 PM
    Still wondering if there is a better way to get a USB COM port to show up at the same time I am using USB Sound.
    7 replies | 263 view(s)
  • kd9kck's Avatar
    07-14-2020, 09:53 PM
    Anyone else have alternatives to editing files in the cores folder?
    7 replies | 263 view(s)
  • kd9kck's Avatar
    07-08-2020, 11:19 PM
    So would it be best just to let it show up with the MIDI device so I don’t have to edit files?
    7 replies | 263 view(s)
  • kd9kck's Avatar
    07-07-2020, 03:36 AM
    Hello, I am working on a project using the teensy 4.0 and I only need Serial and Audio but under the USB Type list their is not an option with just Serial and Audio. If I want to use Serial and Audio I also have to...
    7 replies | 263 view(s)
  • kd9kck's Avatar
    06-20-2020, 01:37 AM
    kd9kck replied to a thread FT8 on Teensy 4 in Project Guidance
    Yea. That is going to be a really problem. But the thing is I don't actually get all the signal's samples at once. (From what I can tell.) I can FFT them as soon as I have enough samples in a buffer of sorts then over...
    15 replies | 468 view(s)
  • kd9kck's Avatar
    06-19-2020, 10:53 PM
    kd9kck replied to a thread FT8 on Teensy 4 in Project Guidance
    Dang it. Was hoping I could use my existing Teensy 4.0 (I might be able to abuse https://github.com/rhelmus/virtmem but its probably not worth the trouble.) I don't know much about the IMXRT chip used in the Teensy 4...
    15 replies | 468 view(s)
  • kd9kck's Avatar
    06-19-2020, 06:13 PM
    kd9kck replied to a thread FT8 on Teensy 4 in Project Guidance
    Also just wondering would it be possible to attach an external SPI ram chip to my Teensy 4.0 I already have in some way or would my only choice for adding PSRAM be to buy a Teensy 4.1?
    15 replies | 468 view(s)
  • kd9kck's Avatar
    06-19-2020, 04:46 PM
    kd9kck replied to a thread FT8 on Teensy 4 in Project Guidance
    I can record some audio if needed. Also in the library I am investigating to use there are many test wave files that are of one 15 sec cycle.
    15 replies | 468 view(s)
  • kd9kck's Avatar
    06-19-2020, 04:01 PM
    kd9kck replied to a thread FT8 on Teensy 4 in Project Guidance
    Also another question I have is if its possible to run the Teensy at a lower sample rate? As running at 44.1 Khz mean I need FFT with 7056 bins. While the protocol will work with a sample rate of 12 Khz with 1920 bins....
    15 replies | 468 view(s)
  • kd9kck's Avatar
    06-19-2020, 04:49 AM
    kd9kck replied to a thread FT8 on Teensy 4 in Project Guidance
    Yea. Thats an idea. Plus the Teensy 4.1 has ethernet which is nice as well. I think I am going to try my best to get the memory foot print down on my server first then hopefully it will be able to fit on the 4.0...
    15 replies | 468 view(s)
  • kd9kck's Avatar
    06-19-2020, 03:19 AM
    kd9kck replied to a thread FT8 on Teensy 4 in Project Guidance
    Heres a valgrind run on one of the test wavs. chibill@jwg1:~/Desktop/ft8_lib$ valgrind ./decode_ft8 tests/20m_busy/test_01.wav ==40938== Memcheck, a memory error detector ==40938== Copyright (C) 2002-2017, and GNU...
    15 replies | 468 view(s)
  • kd9kck's Avatar
    06-19-2020, 03:01 AM
    kd9kck replied to a thread FT8 on Teensy 4 in Project Guidance
    How FT4 might have better luck then FT8 due to having shorter time slices.Requiring less memory for audio samples. But it would require more processing I think. I will try and compile it and take a look will...
    15 replies | 468 view(s)
  • kd9kck's Avatar
    06-19-2020, 12:06 AM
    Hello, I am working on implementing FT8 audio processing using the Teensy 4.0. I am basing my process off https://github.com/kgoba/ft8_lib So far I have figured out that I will be getting very close to the full...
    15 replies | 468 view(s)
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About kd9kck

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About kd9kck
Biography:
A 4th year student at Illinois Institute of Technology
Active Ham Radio Operator
Location:
Chicago,IL
Interests:
Ham Radio,Programming,Building stuff
Occupation:
IT Assistant

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Possible to use Teensy 4.0 as just Serial and Audio? 08-11-2020 08:53 PM
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08-12-2020 12:00 AM
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02-04-2020