PlayBeep() will be noisy if you modify the DMA buffer parameters.

Using the PlayRawPCM example test, modify the DMA buffering in AtomSPK.cpp.

bool ATOMSPK::begin(int __rate)
{
    esp_err_t err = ESP_OK;

    i2s_driver_uninstall(SPAKER_I2S_NUMBER);
    i2s_config_t i2s_config = {
        .mode = (i2s_mode_t)(I2S_MODE_MASTER),
        .sample_rate = __rate,
        .bits_per_sample = I2S_BITS_PER_SAMPLE_16BIT, // is fixed at 12bit, stereo, MSB
        .channel_format = I2S_CHANNEL_FMT_ONLY_RIGHT,
        .communication_format = I2S_COMM_FORMAT_I2S,
        .intr_alloc_flags = ESP_INTR_FLAG_LEVEL1,
        .dma_buf_count = 8,     //<------modify
        .dma_buf_len = 1024,    //<------modify
    };
    ...
    ...

Then execute _AtomSPK.PlayBeep(), sound plays, but there is a lot of noise when the sound ends.

void setup(){
    M5.begin(false,false,false);
    _AtomSPK.begin();
    _AtomSPK.playBeep(2500, 2000, 10000);
}

void loop(){
    if(M5.Btn.isPressed()){
    }
    M5.update();
}

Is there something wrong with my operation?

m5stack / M5Atom

PlayBeep() will be noisy if you modify the DMA buffer parameters. #66