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<pre class="workstation-terminal">
root@desk-mx8mm:~# aplay M1F1amixer sset "Speaker" onSimple mixer control 'Speaker',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [on]root@desk-mx8mm:~# cp /mnt/sample_22_frames.mp3 .^Croot@desk-mx8mm:~# amixer sset "Speaker Analog" 100Simple mixer control 'Speaker Analog',0 Capabilities: pvolume pvolume-joined Playback channels: Mono Limits: Playback 0 - 127 Mono: Playback 100 [79%] [-13.50dB]root@desk-mx8mm:~# amixer sset "Speaker Driver" on 2Simple mixer control 'Speaker Driver',0 Capabilities: pvolume pvolume-joined pswitch pswitch-joined Playback channels: Mono Limits: Playback 0 - 3 Mono: Playback 2 [67%] [18.00dB] [on]root@desk-mx8mm:~# amixer sset "DAC" 100Simple mixer control 'DAC',0 Capabilities: pvolume Playback channels: Front Left - Front Right Limits: Playback 0 - 175 Mono: Front Left: Playback 100 [57%] [-int1613.50dB] Front Right: Playback 100 [57%] [-AFsp13.wav50dB]root@desk-mx8mm:~# amixer sset "Output Left From Left DAC" onPlaying WAVE Simple mixer control 'Output Left From Left DAC'M1F1,0 Capabilities: pswitch pswitch-int16joined Playback channels: Mono Mono: Playback [on]root@desk-AFspmx8mm:~# aplay sample_22_frames.mp3 Playing raw data 'sample_22_frames.wavmp3' : Signed 16 Unsigned 8 bit Little Endian, Rate 8000 Hz, StereoMono
</pre>In order to unmute the speaker the <code>alsamixer</code> utility can be used.