On an Ubuntu system 18.04 (4.15 kernel) with a onboard Intel audio, a
HDMI card, a v. cheap audio USB and a FIIO USB DAC.
Code:
--------------------
minitower$ squeezelite -l
Output devices:
default - Playback/recording through the PulseAudio
sound server
null - Discard all samples (playback) or generate
zero samples (capture)
pulse - PulseAudio Sound Server
sysdefault:CARD=PCH - HDA Intel PCH, ALC887-VD Analog - Default
Audio Device
front:CARD=PCH,DEV=0 - HDA Intel PCH, ALC887-VD Analog - Front
speakers
surround21:CARD=PCH,DEV=0 - HDA Intel PCH, ALC887-VD Analog - 2.1
Surround output to Front and Subwoofer speakers
surround40:CARD=PCH,DEV=0 - HDA Intel PCH, ALC887-VD Analog - 4.0
Surround output to Front and Rear speakers
surround41:CARD=PCH,DEV=0 - HDA Intel PCH, ALC887-VD Analog - 4.1
Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=PCH,DEV=0 - HDA Intel PCH, ALC887-VD Analog - 5.0
Surround output to Front, Center and Rear speakers
surround51:CARD=PCH,DEV=0 - HDA Intel PCH, ALC887-VD Analog - 5.1
Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=PCH,DEV=0 - HDA Intel PCH, ALC887-VD Analog - 7.1
Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=PCH,DEV=0 - HDA Intel PCH, ALC887-VD Digital - IEC958
(S/PDIF) Digital Audio Output
dmix:CARD=PCH,DEV=0 - HDA Intel PCH, ALC887-VD Analog - Direct
sample mixing device
dmix:CARD=PCH,DEV=1 - HDA Intel PCH, ALC887-VD Digital - Direct
sample mixing device
dmix:CARD=PCH,DEV=2 - HDA Intel PCH, ALC887-VD Alt Analog - Direct
sample mixing device
dsnoop:CARD=PCH,DEV=0 - HDA Intel PCH, ALC887-VD Analog - Direct
sample snooping device
dsnoop:CARD=PCH,DEV=1 - HDA Intel PCH, ALC887-VD Digital - Direct
sample snooping device
dsnoop:CARD=PCH,DEV=2 - HDA Intel PCH, ALC887-VD Alt Analog - Direct
sample snooping device
hw:CARD=PCH,DEV=0 - HDA Intel PCH, ALC887-VD Analog - Direct
hardware device without any conversions
hw:CARD=PCH,DEV=1 - HDA Intel PCH, ALC887-VD Digital - Direct
hardware device without any conversions
hw:CARD=PCH,DEV=2 - HDA Intel PCH, ALC887-VD Alt Analog - Direct
hardware device without any conversions
plughw:CARD=PCH,DEV=0 - HDA Intel PCH, ALC887-VD Analog - Hardware
device with all software conversions
plughw:CARD=PCH,DEV=1 - HDA Intel PCH, ALC887-VD Digital - Hardware
device with all software conversions
plughw:CARD=PCH,DEV=2 - HDA Intel PCH, ALC887-VD Alt Analog -
Hardware device with all software conversions
hdmi:CARD=NVidia,DEV=0 - HDA NVidia, HDMI 0 - HDMI Audio Output
hdmi:CARD=NVidia,DEV=1 - HDA NVidia, HDMI 1 - HDMI Audio Output
dmix:CARD=NVidia,DEV=3 - HDA NVidia, HDMI 0 - Direct sample mixing
device
dmix:CARD=NVidia,DEV=7 - HDA NVidia, HDMI 1 - Direct sample mixing
device
dsnoop:CARD=NVidia,DEV=3 - HDA NVidia, HDMI 0 - Direct sample snooping
device
dsnoop:CARD=NVidia,DEV=7 - HDA NVidia, HDMI 1 - Direct sample snooping
device
hw:CARD=NVidia,DEV=3 - HDA NVidia, HDMI 0 - Direct hardware device
without any conversions
hw:CARD=NVidia,DEV=7 - HDA NVidia, HDMI 1 - Direct hardware device
without any conversions
plughw:CARD=NVidia,DEV=3 - HDA NVidia, HDMI 0 - Hardware device with
all software conversions
plughw:CARD=NVidia,DEV=7 - HDA NVidia, HDMI 1 - Hardware device with
all software conversions
sysdefault:CARD=Set - C-Media USB Headphone Set, USB Audio -
Default Audio Device
front:CARD=Set,DEV=0 - C-Media USB Headphone Set, USB Audio - Front
speakers
surround21:CARD=Set,DEV=0 - C-Media USB Headphone Set, USB Audio - 2.1
Surround output to Front and Subwoofer speakers
surround40:CARD=Set,DEV=0 - C-Media USB Headphone Set, USB Audio - 4.0
Surround output to Front and Rear speakers
surround41:CARD=Set,DEV=0 - C-Media USB Headphone Set, USB Audio - 4.1
Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Set,DEV=0 - C-Media USB Headphone Set, USB Audio - 5.0
Surround output to Front, Center and Rear speakers
surround51:CARD=Set,DEV=0 - C-Media USB Headphone Set, USB Audio - 5.1
Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Set,DEV=0 - C-Media USB Headphone Set, USB Audio - 7.1
Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=Set,DEV=0 - C-Media USB Headphone Set, USB Audio -
IEC958 (S/PDIF) Digital Audio Output
dmix:CARD=Set,DEV=0 - C-Media USB Headphone Set, USB Audio -
Direct sample mixing device
dsnoop:CARD=Set,DEV=0 - C-Media USB Headphone Set, USB Audio -
Direct sample snooping device
hw:CARD=Set,DEV=0 - C-Media USB Headphone Set, USB Audio -
Direct hardware device without any conversions
plughw:CARD=Set,DEV=0 - C-Media USB Headphone Set, USB Audio -
Hardware device with all software conversions
sysdefault:CARD=Audio - DigiHug USB Audio, USB Audio - Default Audio
Device
front:CARD=Audio,DEV=0 - DigiHug USB Audio, USB Audio - Front speakers
surround21:CARD=Audio,DEV=0 - DigiHug USB Audio, USB Audio - 2.1 Surround
output to Front and Subwoofer speakers
surround40:CARD=Audio,DEV=0 - DigiHug USB Audio, USB Audio - 4.0 Surround
output to Front and Rear speakers
surround41:CARD=Audio,DEV=0 - DigiHug USB Audio, USB Audio - 4.1 Surround
output to Front, Rear and Subwoofer speakers
surround50:CARD=Audio,DEV=0 - DigiHug USB Audio, USB Audio - 5.0 Surround
output to Front, Center and Rear speakers
surround51:CARD=Audio,DEV=0 - DigiHug USB Audio, USB Audio - 5.1 Surround
output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Audio,DEV=0 - DigiHug USB Audio, USB Audio - 7.1 Surround
output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=Audio,DEV=0 - DigiHug USB Audio, USB Audio - IEC958
(S/PDIF) Digital Audio Output
dmix:CARD=Audio,DEV=0 - DigiHug USB Audio, USB Audio - Direct sample
mixing device
dmix:CARD=Audio,DEV=1 - DigiHug USB Audio, USB Audio #1 - Direct
sample mixing device
dsnoop:CARD=Audio,DEV=0 - DigiHug USB Audio, USB Audio - Direct sample
snooping device
dsnoop:CARD=Audio,DEV=1 - DigiHug USB Audio, USB Audio #1 - Direct
sample snooping device
hw:CARD=Audio,DEV=0 - DigiHug USB Audio, USB Audio - Direct
hardware device without any conversions
hw:CARD=Audio,DEV=1 - DigiHug USB Audio, USB Audio #1 - Direct
hardware device without any conversions
plughw:CARD=Audio,DEV=0 - DigiHug USB Audio, USB Audio - Hardware
device with all software conversions
plughw:CARD=Audio,DEV=1 - DigiHug USB Audio, USB Audio #1 - Hardware
device with all software conversions
--------------------
The hw devices also show up with aplay -L
------------------------------------------------------------------------
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