noisy sound vs1053shield_v2
brumla23 opened this issue · comments
Hello, I need some advice. After plugging in and loading the software, the sound on the SPKR (L+, L-, R+, R-) is very noisy. It is stronger on (R+, R-). It behaves the same on all boards. I suspect GBUF, specifically capacitor C21 (if connected C21 to direct after startup, the board resets, but after the sound is subsequently noiseless). Where could the fault be? thanks
Hey @brumla23 !
- Possible short circuit between pins 44 and 45 or 44 and 43 of VS1053 chip.
- Capacitor C23 from the "bad" batch and "noisy". Try replacing it.
- Possibly poor quality power supply.
Thank you for the quick reply to brumla23.
I checked according to recommendation 1 (sound from jack is clear).
Replaced capacitor C23 with another according to point 2.
Tried different sources 3.
Unfortunately, there is a noise when you turn it on (plug to power). But if I keep the ESP32 powered and press the RST button on it. A reboot is performed and then the sound is perfect. I have no idea what to do with it :-(
- It is necessary to clean the board from flux residues.
- Please check that there is no contact on jumper JP1
- Using a multimeter, check the pins of the VS chip for compliance with the circuit (the absence of short circuits between adjacent pins where they should not be)
- Using a multimeter, check the pins of the components around the PAM for consistency with the circuit (no shorts where they should not be)
- Check the operation of the board in the minimum configuration:
#define LED_BUILTIN 2
#define I2S_DOUT 255
#define VS1053_CS 27
#define MUTE_PIN 13
#define MUTE_VAL LOW
I added a button between EN and GND. After turning it on for the first time, I press it, it resets and then the sound is no longer noisy. My knowledge is not at such a level to look for a noise problem after connecting to the power supply. If you don't have any idea, please close the thread. Very nice project. Thanks for the effort.