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schreibfaul1 / ESP32-audioI2S

Play mp3 files from SD via I2S
GNU General Public License v3.0
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frying noise #784

Closed lidense closed 3 weeks ago

lidense commented 3 months ago

I have made a webradio using this library. It works very well with Adafruit feather S3 while using a lolin S3 wroom I hear a very fine frying noise, like very find crackling when sound is heard, not when it is silent. Any idea?

Arielhh commented 3 months ago

I have made a webradio using this library. It works very well with Adafruit feather S3 while using a lolin S3 wroom I hear a very fine frying noise, like very find crackling when sound is heard, not when it is silent. Any idea?

what type of dac you are using?

lidense commented 3 months ago

I'm using a UDA1334A. Regards

kungfupizza commented 3 months ago

I had similar issues when I used PINs 0, 1, 2 on ESP32S3. Also could bue due to tangled wires and interference.

Arielhh commented 3 months ago

sounds like a grounding issue

github-actions[bot] commented 2 months ago

This issue is stale because it has been open for 30 days with no activity.

KartoffelToby commented 2 months ago

had this issue to with MAX98357 and ESP32 S3, even on other pins

Arielhh commented 2 months ago

If you are using MAX98357 module. Remove the 2 capacitors on the output stage. Remove also the 2 ferrites on the output stage and replace them with solder short. This will eliminate that noise.

KartoffelToby commented 2 months ago

@Arielhh thanks for the replying, have you any Pictures of this mod?

I found a other solution, but it still have some noise.

I found the main noise is gone when i connect it to 3,3v on the ESP not 5v direct.

And also make sure if your playing from a SD card its connected via SD_MMC, lack of speed produce noise too

Arielhh commented 2 months ago

@Arielhh thanks for the replying, have you any Pictures of this mod?

I found a other solution, but it still have some noise.

I found the main noise is gone when i connect it to 3,3v on the ESP not 5v direct.

And also make sure if your playing from a SD card its connected via SD_MMC, lack of speed produce noise too

send me a photo of your sound module and i will poit you to the right components. You can also try putting a large electrolytic capacitor (~470uf or higher) on the 5V close to the amplifier module.

KartoffelToby commented 2 months ago

@Arielhh sure no problem, here is a Picture adafruit_products_pinouts.jpg

Arielhh commented 2 months ago

There are 4 components on the top of the photo. The two from both out sides left and right are capacitors connected to the ground - remove them The two middle ones are ferrite remove them and instead replace each one with a short You can have a look at the electronic schematic provided by Adafruit. These are supposed to act as filters but if you look with an oscilloscope you will see they are generation some noise instead of filtering it.

github-actions[bot] commented 1 month ago

This issue is stale because it has been open for 30 days with no activity.

github-actions[bot] commented 3 weeks ago

This issue was closed because it has been inactive for 14 days since being marked as stale.