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  1. Anyone else have alternatives to editing files in...

    Anyone else have alternatives to editing files in the cores folder?
  2. So would it be best just to let it show up with...

    So would it be best just to let it show up with the MIDI device so I don’t have to edit files?
  3. Possible to use Teensy 4.0 as just Serial and Audio?

    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...
  4. Thread: FT8 on Teensy 4

    by kd9kck
    Replies
    15
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    436

    Yea. That is going to be a really problem. But...

    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...
  5. Thread: FT8 on Teensy 4

    by kd9kck
    Replies
    15
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    436

    Dang it. Was hoping I could use my existing...

    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...
  6. Thread: FT8 on Teensy 4

    by kd9kck
    Replies
    15
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    436

    Also just wondering would it be possible to...

    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?
  7. Thread: FT8 on Teensy 4

    by kd9kck
    Replies
    15
    Views
    436

    I can record some audio if needed. Also in the...

    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.
  8. Thread: FT8 on Teensy 4

    by kd9kck
    Replies
    15
    Views
    436

    Also another question I have is if its possible...

    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...
  9. Thread: FT8 on Teensy 4

    by kd9kck
    Replies
    15
    Views
    436

    Yea. Thats an idea. Plus the Teensy 4.1 has...

    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...
  10. Thread: FT8 on Teensy 4

    by kd9kck
    Replies
    15
    Views
    436

    Heres a valgrind run on one of the test wavs. ...

    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...
  11. Thread: FT8 on Teensy 4

    by kd9kck
    Replies
    15
    Views
    436

    How FT4 might have better luck then FT8 due to...

    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...
  12. Thread: FT8 on Teensy 4

    by kd9kck
    Replies
    15
    Views
    436

    FT8 on Teensy 4

    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...
  13. Never got the io range my university uses...

    Never got the io range my university uses unblocked but not a problem anymore because I am out till August.
  14. I am just surprised that a Large University has...

    I am just surprised that a Large University has its whole IP Range banned.
  15. The annoying thing is IIT has owned this chunk of...

    The annoying thing is IIT has owned this chunk of IPs for a long time. https://ipinfo.io/AS29825 has more information.
  16. I have this same problem when on my college...

    I have this same problem when on my college campus. And they even technically own the IP block they hand out to students. (Everyone gets a public IP on my campus because its a tech school and they...
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    I am trying to convert FT8 audio to the RF. I ...

    I am trying to convert FT8 audio to the RF. I could try doing sending of it using that library. Hm.
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    I am working odf experience using the SI5351 for...

    I am working odf experience using the SI5351 for standalone WSPR. I would be using the Teensy and the Si5351 arduino library to set the frequency....
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    I am going to listen to audio from my laptop....

    I am going to listen to audio from my laptop. (From WSJT-X)

    While WSJT-X is transmitting will be the audio representation of the FT-8 (or other mode) signal that would normally go into a Single...
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    Thank you everyone so far for all the help. I...

    Thank you everyone so far for all the help. I will be working on some code to share over the next few days. (Mostly tomorrow.)

    I might also use this project as a starting point for making a WSPR...
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    Okay. I will have to figure out how to write a...

    Okay. I will have to figure out how to write a decimate function because there is none built into the teensy audio library itself.
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    Okay So I did an experiment using the existing...

    Okay So I did an experiment using the existing example for FreqMeasure. It appears that even with a 200hz signal from an audio jack. (Made sure to be 3.3 volts.) it can't find the freq very well at...
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    As an update I had to order a new teensy because...

    As an update I had to order a new teensy because the one I had for this project disappeared. USPS says it should be delivered on Saturday. I have silly question. Is it be better to use the Arduino...
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    I am going to attempt to use FreqMeasure and mess...

    I am going to attempt to use FreqMeasure and mess around a bit and see how that goes.
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    I was thinking of getting one of those eventually...

    I was thinking of getting one of those eventually but right now its not very economical for me. Only have a part time job and i am in college. I have two Si5351 and a 40m band pass filter. I also...
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    I am hoping to just convert the audio from my...

    I am hoping to just convert the audio from my computer to a RF signal using a SI5351 and some filtering. (Because harmonics are bad.)

    I can receive on 40m and 20m with my RTLSDR and wanted to...
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    Not sure what sample rate I will being using...

    Not sure what sample rate I will being using because I can't seem to find sampling rate information in the docs for AudioInputAnalog or AudioInputUSB.

    I am going to take a random guess at the...
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    I am trying to get what frequency exists in an...

    I am trying to get what frequency exists in an area from around 0hz to 2000Hz. Specifically I am trying to get the audio from my laptop from WSJT-X set to FT8 to drive an SI5351 for usage on the HF...
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    This I understand but I was asking if the teensy...

    This I understand but I was asking if the teensy had any build-in FFT that was of a higher resolution because its existing library only has as high as fft1024.
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    Is it possible to have a high resolution FFT.

    I am wondering if there is a way to get a high resolution FFT with the teensy. I am trying to find tones that are only 15 or so hz apart.
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