Hi everyone, I am currently trying to get a simple audio I2S DAC board (https://polyvection.com/shop/plaindac/) to work on a beaglebone green wireless. The components is a PCM5121, a popular one that has an existing driver. so far, - I have a custom compiled kernel with the apropriate driver compiled $ grep PCM512 .config CONFIG_SND_SOC_PCM512x=m CONFIG_SND_SOC_PCM512x_I2C=m - I can boot with a custom device tree including my definition of the board as an "asoc-simple-card" and it get recognise without error on boot. root@beaglebone:~# dmesg |grep sound [ 28.730678] asoc-simple-card sound: pcm512x-hifi <-> 48038000.mcasp mapping ok root@beaglebone:~# lsmod |grep pcm512 snd_soc_pcm512x_i2c 2782 1 snd_soc_pcm512x 24341 1 snd_soc_pcm512x_i2c snd_soc_core 192029 5 snd_soc_pcm512x,snd_soc_davinci_mcasp,snd_soc_edma,snd_soc_omap,snd_soc_simple_card snd_pcm 103172 6 snd_soc_pcm512x,snd_soc_davinci_mcasp,snd_soc_core,snd_soc_omap,snd_pcm_dmaengine - I can open the device with alsamixer, and can confirm the sound is on 100% Howewer, I still can't get any sound of the device. Does someone has experience in regards to asoc audio device and cant give me some thought on easy to miss things ? I am still trying to figure out if I have omitted something on the device tree, or if I need to configure something more on the OS (alsa, pulseaudio ?)... I have attached my device tree, if someone feel like giving a look at it. (my addition from the original one comes after line 73). Also some output that may give you more info that they are giving to me: root@beaglebone:~# aplay -v Pom\ Pom.wav Playing WAVE 'Pom Pom.wav' : Signed 32 bit Little Endian, Rate 44100 Hz, Stereo ALSA <-> PulseAudio PCM I/O Plugin Its setup is: stream : PLAYBACK access : RW_INTERLEAVED format : S32_LE subformat : STD channels : 2 rate : 44100 exact rate : 44100 (44100/1) msbits : 32 buffer_size : 22050 period_size : 5512 period_time : 125000 tstamp_mode : NONE period_step : 1 avail_min : 5512 period_event : 0 start_threshold : 22050 stop_threshold : 22050 silence_threshold: 0 silence_size : 0 boundary : 1445068800 #nothing play and the above stay displayed -as is- until I ctrl-c root@beaglebone:~# aplay -l **** List of PLAYBACK Hardware Devices **** card 0: plaindac [plaindac], device 0: davinci-mcasp.0-pcm512x-hifi pcm512x-hifi-0 [] Subdevices: 0/1 Subdevice #0: subdevice #0 root@beaglebone:~# cat /proc/asound/card0/pcm0p/info card: 0 device: 0 subdevice: 0 stream: PLAYBACK id: davinci-mcasp.0-pcm512x-hifi pcm512x-hifi-0on name: subname: subdevice #0 class: 0 subclass: 0 subdevices_count: 1 subdevices_avail: 0 Regards, Jonathan.