aplay -L
null
    Discard all samples (playback) or generate zero samples (capture)
pulse
    PulseAudio Sound Server
hdmi:CARD=HDMI,DEV=0
    HDA ATI HDMI, HDMI 0
    HDMI Audio Output
default:CARD=Generic
    HD-Audio Generic, ALC3227 Analog
    Default Audio Device
sysdefault:CARD=Generic
    HD-Audio Generic, ALC3227 Analog
    Default Audio Device
front:CARD=Generic,DEV=0
    HD-Audio Generic, ALC3227 Analog
    Front speakers
surround21:CARD=Generic,DEV=0
    HD-Audio Generic, ALC3227 Analog
    2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=Generic,DEV=0
    HD-Audio Generic, ALC3227 Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=Generic,DEV=0
    HD-Audio Generic, ALC3227 Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Generic,DEV=0
    HD-Audio Generic, ALC3227 Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=Generic,DEV=0
    HD-Audio Generic, ALC3227 Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Generic,DEV=0
    HD-Audio Generic, ALC3227 Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers