Dear Mark, Liam Is ALSA or someone controlling that sound card is working ? I'm afraid below case. ex) FSI-AK4642 # insmod snd-soc-ak4642.ko # insmod snd-soc-fsi-ak4642.ko # # aplay sound.wav # rmmod snd-soc-fsi-ak4642.ko I guess noone call soc_pcm_trigger(xx, STOP); who should control it ? Best regards -- Kuninori Morimoto