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wm8731 on VARISCITE DART6-UL no sound

Question asked by Paolo Santini on Apr 9, 2019
Latest reply on Apr 26, 2019 by Paolo Santini

I'm facing with a problem. My board,  VARISCITE DART 6-UL based on i.mx6 processor, doesn't sound when I start a "aplay" session from my application.

I tried to use it on the evaluation board where I launch aplay from terminal and it sounds my .wav file with no problem.

During initial boot-up phase, configuration seems appearing as to be right:

Advanced Linux Sound Architecture Driver Initialized.


ALSA device list:
  #0: wm8731-audio


ALSA: Restoring mixer settings...
But if I try the following:

aplay AudioSample2.wav

logout warns aplay is working:

Playing WAVE 'AudioSample2.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo

and disappears when the audio file is finishes.

Unfortunately, no sound comes from my loudspeaker (loudspeaker has no problem, because it sound when I emits a squarewave signal coming from another microcontroller serially linked to.

Alos checking "menuconfig" (see enclosed) all seems to be correctly set.

Any suggestion about?