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Hello everyone, I try with new teensy4.1, I got the output without any noise, But I don't know what is the exact problem in the previous teensy4.1 (which I tried before), Once I found the Issue, I will let you know guys, thank you for your replay in your busy schedule. Thanks a lot for support.

I disconnect the 5V of PAM8403 from the teensy4.1 and powered up with 5V power bank, but still the noise is there, and in this setup,But if i short both R G of PAM8403 and then power up the PAM8403 by using power bank, in this case I did not hear any noise.

I disconnect the input signal and short both L and R inputs on the PAM8403 module to GND, But Still the noise is there.Here I will attach the exact connection detail for your reference. Note: I couldnt stack the Audio shield and Teensy4.1, So I connect this by using single stand cables. Ground...

This Noise is what i am receving even without SD-card playback. With SD Card playback , I do get the sound but along with noise. Right now i have checked only with class D amp.

I’ve already tried the methods you’ve mentioned, including adding large capacitors (100-200uF) to the power supply, shortening the wires from the amp to the speakers, and minimizing the length of the power rails. I’ve also made sure to connect the different GNDs properly but same issue...

When I connect the power supply from the Laptop USB port noise will occurs and Other setup is that the connection between the teesny4.1 and the pam8403 through the audio shield. -> for the teensy4.1 I am using laptop USB port -> for Audio shield I get 3.3V from the teensy4.1 -> for the PAM8403...

Hi everyone, I’m working on a Teensy 4.1 audio project using the Teensy Audio Shield (SGTL5000) and a PAM8403 amplifier. The system plays audio from an SD card, but I’m consistently getting noisy output on the speaker connected via the PAM8403. Below are my details and tests: Hardware...

KurtE , joepasquariello , jmarsh Thanks so much for your findings and solutions , THis helped me me fixed EEPROM issue.

This issue is caused by using EEPROM. When the EEPROM is used somehow the buffer is reduced to 128K FLASH. So I cleared all the EEPROM , But the buffer size becomes 0K FLASH. Is there any way to revert the buffer size to default 8MB size?

Yes Yes , Set A code uses the EEPROM both write and read

Thanks for insights . I got the same results when uploading the same sketch. I do get the same result. Thanks from sharing the info in readme, I will check in (settable in FlashTxx.h).

Hello everyone, I've been using the FlasherX library to program my Teensy 4.1 boards. I have two Teensy 4.1 boards, one used (Set A) and one newly purchased (Set B). I encountered an issue with inconsistent flash buffer sizes between the two boards when uploading the same FlasherX code. Teensy...