Using speaker from Chipsee cape(BBB-EXP-C) on BBB to play a sound


I have BeagleBoneBlack(revC) and this capacitive touchscreen from Chipsee (BBB-EXP-C):

I would like to use speaker from Chipsee board.

uname -a

Linux beaglebone 4.4.62-ti-r103 #1 SMP Fri May 12 22:14:44 UTC 2017 armv7l GNU/Linux

amixer sset ‘PCM’ 100%

Simple mixer control 'PCM',0 Capabilities: pvolume Playback channels: Front Left - Front Right Limits: Playback 0 - 127 Mono: Front Left: Playback 127 [100%] [0.00dB] Front Right: Playback 127 [100%] [0.00dB]

aplay -l

**** List of PLAYBACK Hardware Devices **** card 0: EVM [DA830 EVM], device 0: AIC3X tlv320aic3x-hifi-0 [] Subdevices: 1/1 Subdevice #0: subdevice #0

But it can be AUDIO OUT from BBB board, I don’t know.

aplay /home/debian/sound.wav

Playing WAVE '/home/debian/sound.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo

… without any error

But I cannot hear any sound.
Thanks for any suggestion.

From HW specification:

Audio: On board Speaker(1W),and 1 Audio out and 1 Mic In Connector(Can change to Line in by change resistor)

But there is no information about using On Board Speaker(1W)