null
    Discard all samples (playback) or generate zero samples (capture)
pulse
    PulseAudio Sound Server
hdmi:CARD=PCH,DEV=0
    HDA Intel PCH, HDMI 0
    HDMI Audio Output
hdmi:CARD=PCH,DEV=1
    HDA Intel PCH, HDMI 1
    HDMI Audio Output
hdmi:CARD=PCH,DEV=2
    HDA Intel PCH, HDMI 2
    HDMI Audio Output
hdmi:CARD=PCH,DEV=3
    HDA Intel PCH, HDMI 3
    HDMI Audio Output
hdmi:CARD=PCH,DEV=4
    HDA Intel PCH, HDMI 4
    HDMI Audio Output
hdmi:CARD=PCH,DEV=5
    HDA Intel PCH, HDMI 5
    HDMI Audio Output
hdmi:CARD=PCH,DEV=6
    HDA Intel PCH, HDMI 6
    HDMI Audio Output
hdmi:CARD=PCH,DEV=7
    HDA Intel PCH, HDMI 7
    HDMI Audio Output
hdmi:CARD=PCH,DEV=8
    HDA Intel PCH, HDMI 8
    HDMI Audio Output
hdmi:CARD=PCH,DEV=9
    HDA Intel PCH, HDMI 9
    HDMI Audio Output
hdmi:CARD=PCH,DEV=10
    HDA Intel PCH, HDMI 10
    HDMI Audio Output
