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  • DD4WH's Avatar
    08-09-2022, 06:16 PM
    Please read my last message...and follow the link and read.
    87 replies | 2303 view(s)
  • DD4WH's Avatar
    08-09-2022, 06:04 PM
    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! Guest, not guist...
    87 replies | 2303 view(s)
  • DD4WH's Avatar
    08-05-2022, 09:34 AM
    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 that in a room (or even...
    87 replies | 2303 view(s)
  • DD4WH's Avatar
    08-04-2022, 01:12 PM
    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 windshield foam to avoid pops in the...
    87 replies | 2303 view(s)
  • DD4WH's Avatar
    08-04-2022, 08:18 AM
    DD4WH replied to a thread FT8 on Teensy 4 in Project Guidance
    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 waiting for...
    16 replies | 1988 view(s)
  • DD4WH's Avatar
    08-04-2022, 06:31 AM
    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 original telephone...
    87 replies | 2303 view(s)
  • DD4WH's Avatar
    08-01-2022, 07:28 PM
    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 order.
    87 replies | 2303 view(s)
  • DD4WH's Avatar
    08-01-2022, 06:23 PM
    * 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 quality is OK ! * No,...
    87 replies | 2303 view(s)
  • DD4WH's Avatar
    08-01-2022, 05:31 PM
    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 board!
    36 replies | 1679 view(s)
  • DD4WH's Avatar
    08-01-2022, 12:33 PM
    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 will appear as a...
    87 replies | 2303 view(s)
  • DD4WH's Avatar
    08-01-2022, 07:46 AM
    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, which leads to audio...
    87 replies | 2303 view(s)
  • DD4WH's Avatar
    07-31-2022, 09:14 PM
    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 files after the...
    87 replies | 2303 view(s)
  • DD4WH's Avatar
    07-28-2022, 02:30 PM
    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 enthusiasts with ...
    0 replies | 127 view(s)
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About DD4WH

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About DD4WH
Location:
Central Europe
Interests:
Software Defined Radio, Digital Signal Processing, Bat detection & bioacoustics

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Teensy 4.0 - based Audio Guestbook 08-09-2022 06:16 PM
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10-25-2015