Are you sure the noise is in the output on the GPIO and not your measuring system? You can easily get stuff like this if your probes bandwith is too low, you use pigtails off the probe pin, or your ground isn't in the right position. I have measured the WS and BCLK and signal is good,except the MCL...

Are you sure the noise is in the output on the GPIO and not your measuring system? You can easily get stuff like this if your probes bandwith is too low, you use pigtails off the probe pin, or your ground isn't in the right position. Hi ESP_Sprite, I have measure the WS and BCLK at the same time, a...

Hi, As the esp32_technical_reference_manual_en.pdf mentioned that MCLK could output via GPIO0,I try below code: //output clock for I2S0 to CLK_OUT1 //pdf page 67 //(*((int*)PIN_CTRL)) = (*((int*)PIN_CTRL))&0xFFFFFFF0; reg_val = REG_READ(PIN_CTRL); ESP_LOGI(TAG, "PIN_CTRL before:%x", reg_val); REG_WR...