Jetson nano use RT5639 CODEC

I’m trying to porting realtek’s 5639 codec to Nano, with nano’s I2S and I2C interface.When i use aplay to play test.wav, The following problems occur:

  1. The headphones can hear the sound,but the sound from the headphones is very quiet;
  2. The headphones hear a lot of noise, the correct sound is very low.

Here is my debug log:

  1. aplay cmd:
    ~# aplay -D plughw:CARD=tegrasndt210ref,DEV=0 test.wav
    Playing WAVE ‘test.wav’ : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
  2. I2S4 output clocks:
    FS: 44.1khz
    MCLK: 11.29Mhz
    SCLK: 1.41Mhz
  3. ~# cat /proc/device-tree/sound/mclk-fs | xxd
    00000000: 0000 0100
  4. Reference linking:
    Porting realtek rt5639 codec to Nano
    Porting realtek ALC5640(rt5640) codec to Nano

Duplicated with Jetson nano connect RT5639 CODEC using I2S4 interface - Jetson & Embedded Systems / Jetson Nano - NVIDIA Developer Forums

Thanks for your reply,kayccc
When I first published the theme, the system did not approve, so I added several more, and all of them passed the next day, but I did not have the authority to delete the repeated theme, sorry!
Could you give me some advice about alC5639?

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