----
====== coreELEC & USB DAC ======
----

  * reference
    * [[https://discourse.coreelec.org/t/usb-sound-card-as-default-device/1454/6|USB sound card as default device on CoreELEC [08/15/2020]]]


[[mnretrogamer:sbc:odroid_c4:home_c4|odroid c4]] & [[mnretrogamer:os:coreelec:home_coreelec|coreELEC]] 9.2.4.2\\
\\
image = CoreELEC-Amlogic-ng.arm-9.2.4.2-Odroid_C4.img.gz

<code>

login as: root
root@mnretrogamer012's password:
##############################################
#                  CoreELEC                  #
#            https://coreelec.org            #
##############################################

CoreELEC (official): 9.2.4.2 (Amlogic-ng.arm)
mnretrogamer012:~ # aplay -L
null
    Discard all samples (playback) or generate zero samples (capture)
default:CARD=AMLAUGESOUND
    AML-AUGESOUND,
    Default Audio Device
sysdefault:CARD=AMLAUGESOUND
    AML-AUGESOUND,
    Default Audio Device
surround71:CARD=AMLAUGESOUND,DEV=0
    AML-AUGESOUND,
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=AMLAUGESOUND,DEV=0
    AML-AUGESOUND,
    IEC958 (S/PDIF) Digital Audio Output
hdmi:CARD=AMLAUGESOUND,DEV=0
    AML-AUGESOUND,
    HDMI Audio Output
default:CARD=M2
    Modi 2, USB Audio
    Default Audio Device
sysdefault:CARD=M2
    Modi 2, USB Audio
    Default Audio Device
front:CARD=M2,DEV=0
    Modi 2, USB Audio
    Front speakers
surround21:CARD=M2,DEV=0
    Modi 2, USB Audio
    2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=M2,DEV=0
    Modi 2, USB Audio
    4.0 Surround output to Front and Rear speakers
surround41:CARD=M2,DEV=0
    Modi 2, USB Audio
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=M2,DEV=0
    Modi 2, USB Audio
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=M2,DEV=0
    Modi 2, USB Audio
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=M2,DEV=0
    Modi 2, USB Audio
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=M2,DEV=0
    Modi 2, USB Audio
    IEC958 (S/PDIF) Digital Audio Output

</code>

check out the audio configuration; we want device #1 as the default.  CARD=M2.

<code>

mnretrogamer012:~ # cat /proc/asound/cards
 0 [AMLAUGESOUND   ]: AML-AUGESOUND - AML-AUGESOUND
                      AML-AUGESOUND
 1 [M2             ]: USB-Audio - Modi 2
                      Schiit Audio Modi 2 at usb-xhci-hcd.0.auto-1.3, high speed

</code>

asound.conf verify & re-configuration -- note, this is not a standard location for asound.conf!

<code>

login as: root
root@mnretrogamer012's password:
##############################################
#                  CoreELEC                  #
#            https://coreelec.org            #
##############################################

CoreELEC (official): 9.2.4.2 (Amlogic-ng.arm)
mnretrogamer012:~ # ls
backup       emulators    lost+found   pictures     screenshots  videos
downloads    ip.txt       music        roms         tvshows
mnretrogamer012:~ # cd .config
mnretrogamer012:~/.config # pwd
/storage/.config
mnretrogamer012:~/.config # ls
aacs                 modprobe.d           samba.conf.sample
asound.conf          modules-load.d       sleep.conf.d
boot.hint            mpv                  sysctl.d
boot.status          pulse                system.d
hosts.conf           pulse-daemon.conf.d  timesyncd.conf.d
hwdb.d               rc_keymaps           tmpfiles.d
iptables             rc_maps.cfg.sample   udev.rules.d
logind.conf.d        retroarch            wireguard
mnretrogamer012:~/.config # cat asound.conf
pcm.!default {
type plug
slave {
pcm "hw:0,0"
}
}
mnretrogamer012:~/.config # vi asound.conf

</code>