How to dynamically modify the sample rate or channel

[Father001]

Hello, I have a need to play SD card mp3 files and some other audio data, when playing mp3, the library will automatically adjust the sample rate, number of channels, etc., which is great. When the mp3 file finishes playing, I need to change the sample rate such as setting it to 16000Hz, mono (other audio data formats); I read the source code and didn't find a way to change the sample rate, I tried to use i2s_set_sample_rates((I2S_NUM_0, 16000);，

void audio_eof_mp3(const char *info)
{ // end of file
  Serial.print("eof_mp3     ");
  Serial.println(info);
  delay(300);
  i2s_set_sample_rates((I2S_NUM_0, 16000);
}

Then use i2s_write to play other audio:i2s_write(I2S_SPK_PORT, buffer, bytes_read, &bytes_written, portMAX_DELAY);But this one doesn't seem to work, and the sound sounds very fast

[schreibfaul1]

You would have to extend the library for this.
You need the handle to I2S, then you can stop I2S, change the sample rate and then start I2S again.