Forum Rule: Always post complete source code & details to reproduce any issue!

Search:

Type: Posts; User: DD4WH

Page 1 of 10 1 2 3 4

Search: Search took 0.01 seconds.

  1. Replies
    147
    Views
    4,697

    Congratulations!!! Very good. Thanks a lot for...

    Congratulations!!! Very good.

    Thanks a lot for your detailed feedback and recommendations, which will help builders to check their builds and make them work :-).

    Have fun with the Teensy! Frank...
  2. Replies
    147
    Views
    4,697

    Yes, the microSoundRecorder sketch by WMXZ does...

    Yes, the microSoundRecorder sketch by WMXZ does allow to record audio without glitches on the T3.6. Search for it on github. You would have to merge the two sketches together, adapt them to the...
  3. Replies
    147
    Views
    4,697

    It may help to read the instructions from my...

    It may help to read the instructions from my github:
    https://github.com/DD4WH/audio-guestbook
    Also make sure you understand whether your handset switch opens or closes on lifting the handset (and...
  4. Replies
    147
    Views
    4,697

    That is pretty normal behaviour! By using the...

    That is pretty normal behaviour! By using the standard Teensy audio lib modules, it is not possible to record audio without such glitches. A better SD card might help, but in most cases you have got...
  5. Replies
    147
    Views
    4,697

    Could you explain in detail what that means? What...

    Could you explain in detail what that means? What is "small parts", what is "recoding counting number" ? I do not understand what is going right and what is going wrong in your setup.
  6. Please do not duplicate threads. Use the...

    Please do not duplicate threads. Use the original thread.
    Use a wav with 44.1ksps sample rate
    Consider following the detailed instructions on https://github.com/DD4WH/audio-guestbook
  7. Replies
    147
    Views
    4,697

    In my github, I stated very clearly, that the...

    In my github, I stated very clearly, that the code only works with T4.0 and T4.1
  8. Replies
    147
    Views
    4,697

    The code you use, is not the code from my github....

    The code you use, is not the code from my github. There are several #ifdef for Teensy LC.
    I have only tried T4 and I doubt the code will run on Teensy LC
  9. Replies
    3
    Views
    89

    Probably you want to bypass the audio...

    Probably you want to bypass the audio transformers, because they have much too low audio bandwidth.
    Did you exchange the sampling caps and OPAmp filter caps?
  10. Replies
    75
    Views
    21,106

    Great to hear! You probably know that there...

    Great to hear!
    You probably know that there already is a Teensy implementation of an FT8 decoder, have a look here, maybe there is something useful in it. They use 32ksps and decimate by 5 to get...
  11. Replies
    3
    Views
    89

    Maybe try to set sample rate to 192k or even...

    Maybe try to set sample rate to 192k or even higher. Also be sure that the CPU freq is 600MHz.
    Ensure that your hardware has NO RF lowpass filter.
    Most important, for QRP labs hardware, you have to...
  12. Replies
    75
    Views
    21,106

    Bob, that is really fantastic and a long awaited...

    Bob, that is really fantastic and a long awaited feature. I can imagine the demodulation is even a lot more demanding!

    I have a lot of other obligations at the moment, so can't test this now, but...
  13. Replies
    19
    Views
    509

    Excellent, thanks for the explanation, that...

    Excellent, thanks for the explanation, that clears many things up for me!
    When I find some more time, I will try to make the record buffer larger.
    If I remember correctly, I tested the SD cards a...
  14. Replies
    147
    Views
    4,697

    Same here, the #include is not...

    Same here, the
    #include <MTP_Teensy.h> is not in orange.
    But if you can compile the code, everything is fine with that lib.

    Did you set Tools --> USB type --> Serial & MTP Disk (Experimental) ?...
  15. Replies
    19
    Views
    509

    Thanks for your help! WORKING * I have the...

    Thanks for your help! WORKING
    * I have the sketch working now on a Teensy 4.0 with PCM5102 and PCM1808 and SD card holder soldered with flying wires to the 4 bit SDIO port (Stereo WAV recording and...
  16. Replies
    19
    Views
    509

    Thanks a lot! Looks good, will test in the next...

    Thanks a lot! Looks good, will test in the next days.

    Do I have to insert a
    yield(); in
    loop to make it work?
  17. Replies
    19
    Views
    509

    Very interesting! We are really in need for a...

    Very interesting!

    We are really in need for a more reliable way to record audio with the Teensy Audio library. At the moment, this is not possible without frequently occuring glitches and/or...
  18. Replies
    147
    Views
    4,697

    No, the Teensy audio board is necessary, because:...

    No, the Teensy audio board is necessary, because:
    * it has a built-in adjustable gain pre-amplifier for the microphone input
    * it has a good quality ADC
    * it has a good quality DAC (which the T4...
  19. Replies
    147
    Views
    4,697

    You can try two things: * if you record the...

    You can try two things:
    * if you record the greeting message with the telephone itself (this is possible with the latest sketch), you can adjust the microphone preamp sensitivity in line of the...
  20. Replies
    2
    Views
    102

    Please do not create duplicate threads. If you...

    Please do not create duplicate threads. If you build the Audio guest book, follow the instructions here:...
  21. Replies
    147
    Views
    4,697

    Yes, please read ALL the instruction text here: ...

    Yes, please read ALL the instruction text here:

    https://github.com/DD4WH/audio-guestbook

    The sketch only works with Arduino 1.8.19 and Teensyduino 1.57

    Please read carefully all the...
  22. Replies
    147
    Views
    4,697

    The code has been updated again: * user...

    The code has been updated again:
    * user configuration is now very easy, because I structured some precompile options at the top of the sketch

    1.) does your handheld OPEN or CLOSE the switch when...
  23. Replies
    147
    Views
    4,697

    There is now a new software version available: ...

    There is now a new software version available:

    * it is now possible to record the greeting message directly on the phone the first time you use the telephone
    * the software checks whether there...
  24. Replies
    147
    Views
    4,697

    Please read my last message...and follow the link...

    Please read my last message...and follow the link and read.
  25. Replies
    147
    Views
    4,697

    Hi! Go here:...

    Hi!
    Go here:
    https://github.com/DD4WH/audio-guestbook
    Scroll down to the section "Compiling the code" and follow the instructions 😀.
    Good luck and success!

    PS: check your sketchname for typo!...
  26. Replies
    147
    Views
    4,697

    As Mark mentioned, the buzzing will probably not...

    As Mark mentioned, the buzzing will probably not be caused by the software, but the wiring of your microphone. You could try changing the following:
    * try to power the Teensy by a power bank. Do...
  27. Replies
    147
    Views
    4,697

    291062910729108 Not very elegant, but it is...

    291062910729108

    Not very elegant, but it is working . . .
    Make the inner (shielded) cable a little longer than the wound cable, so you have some flexibility.
    I added a special black microphone...
  28. Thread: FT8 on Teensy 4

    by DD4WH
    Replies
    16
    Views
    2,071

    Charley W5BAA has programmed Pocket_FT8 on Teensy...

    Charley W5BAA has programmed Pocket_FT8 on Teensy 3.6 and Teensy 4.1.

    It implements real-time decoding and coding FT8 signals for ham radio portable operation.

    Have not tried it yet, I am still...
  29. Replies
    147
    Views
    4,697

    Hi! I will adress some of the issues mentioned in...

    Hi! I will adress some of the issues mentioned in the posts above and try to give some potential solutions:

    AUDIO Quality / microphone:
    * if you use a new electret microphone capsule (and not the...
  30. Replies
    147
    Views
    4,697

    Have a look here:...

    Have a look here:
    https://github.com/DD4WH/audio-guestbook
    That code plays only the most recent message, not all the messages. It would be easy to modify it to play all the messages in reverse...
  31. Replies
    147
    Views
    4,697

    * Best connection of the Teensy and audio board...

    * Best connection of the Teensy and audio board is through headers. Do not use cables for that connection, the connections have to be as short as possible.
    * for the button connections every wire...
  32. Replies
    43
    Views
    2,983

    Sticky: Thanks Paul for that excellent information on...

    Thanks Paul for that excellent information on Teensyduino 1.57 in your blog article.
    This made it possible for me for the first time to successfully implement MTP access to the SD card on an audio...
  33. Replies
    147
    Views
    4,697

    Very good that you solved the SD card formatting...

    Very good that you solved the SD card formatting issue!

    I modified the original code further:

    * added MTP support: now you can access the recorded WAV files on the SD card via USB, the SD card...
  34. Replies
    147
    Views
    4,697

    Yes. As stated in my previous message, this can...

    Yes. As stated in my previous message, this can be expected, if the standard Audio lib Record example is used. Most SD cards take too long to respond and have write latencies up to a few hundred ms,...
  35. Replies
    147
    Views
    4,697

    Here is my working version: * tweaked for a...

    Here is my working version:

    * tweaked for a telephone with closing contact when lifting up the handheld
    * saving recorded messages as WAV files to the SD card, eliminating the need to convert RAW...
  36. Pitch shift, frequency shifting, vocoder and granular effect for bird song listening

    Many people suffer from high frequency hearing loss, especially people above the age of 50. Lang Elliott had the idea of lowering the pitch of bird songs with a special device in order to help bird...
  37. Ethan, what was your Timed Recording pattern?...

    Ethan,

    what was your Timed Recording pattern?

    That LED pattern in your video indicates that the Teensy is not able to mount your SD card. That explains why there is no value above 0 in the...
  38. Replies
    9
    Views
    693

    Come on, its not so difficult to find . . . Try...

    Come on, its not so difficult to find . . .
    Try Title 47 of the Code of Federal Regulations . . .
  39. You are clearly wrong with that statement!...

    You are clearly wrong with that statement!
    Connecting an antenna to a Teensy pin (without any further hardware) can make the Teensy an illegal transmitter with much more power than is legally...
  40. Perfect, thanks Walter!

    Perfect, thanks Walter!
  41. OK. This probably means that after the deep sleep...

    OK. This probably means that after the deep sleep of the recorder, the SD card is not successfully mounted again (fast blinking indicates a problem with the SD card mounting: intended to indicate...
  42. Ethan, I have a suspicion regarding your problem...

    Ethan, I have a suspicion regarding your problem of the recorder not starting after having gone into deep sleep:

    * does the Teensy LED blink when the recorder has stopped recording ?
  43. First test result: * 7 recorders running for 4...

    First test result:
    * 7 recorders running for 4 days now
    * 1-12h and 13-24h
    * 15sec record, 15sec record, 30sec sleep
    * all equipped with the suspect 64GB microSD cards, which caused problems...
  44. perfect, thanks, exactly the info I was looking...

    perfect, thanks, exactly the info I was looking for! will try and report back and eventually place a PR after testing!
  45. Testing with the following modification at the...

    Testing with the following modification at the moment (this is expected to do a restart of the Teensy every time the SD card cannot be initiated):


    #define CPU_RESTART_ADDR (uint32_t *)0xE000ED0C...
  46. one more thought: maybe the reason for the...

    one more thought:

    maybe the reason for the sporadic failure of SD card begin statement is the usage of the new/faster SD lib?

    Because the old SD cards were tested with the old software and the...
  47. Tim, Walter, thanks for the explanations, now I...

    Tim, Walter, thanks for the explanations, now I understand! I can confirm also, that the firmware compiles WITHOUT downloading the SdFat lib by Bill Greiman, thanks for your hints!

    I have one...
  48. OK: it seems I have to install the latest...

    OK: it seems I have to install the latest teensyduino 1.54 beta-7 in order to make the microSoundRecorder compile! It works now!

    Not sure if I understand why this is so, but good to know there is...
  49. Do I need to delete the Sd libs inside the...

    Do I need to delete the Sd libs inside the installation of Teensyduino or Arduino ?
    Or do I need to use the latest beta of Teensyduino? Hmm --> will try that now.
  50. hi Walter, had some time today to try the new...

    hi Walter,

    had some time today to try the new version of microSoundRecorder.

    However, I do not seem to be able to compile it.

    Arduino 1.8.13 TD 1.53

    no other SD library installed except...
Results 1 to 50 of 500
Page 1 of 10 1 2 3 4