Hi Mark, > Has your board connected the bias to the microphone widget it defines? > Unless your board says that the bias is in use on a given board it won't be enabled. Thanks for this tip! The problem is that the machine-driver mxs-sgtl5000 don't support audio-routing. I've prepared a patch that will be submitted this noon. Regards, Christian _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel