I've buy this DAC :
A CMEDIA CM6631A
HIFI CM6631A DAC Board USB Digital interface 32 / 24Bit 192k USB To I2S/SPDIF Coaxial Output Audio Decoder Analog Converter
Note : This DAC is a little noisy when using sampling frequencies above 48000 Hz, ultimately I do not recommend it. 😒
Compiling MPD from git (version 0.24) optional and not verified !
~#nano buildmpd.sh
#ALL AS ROOT
sudo su
cd ~
#Stop current MPD then remove
mpd --kill
service mpd stop
apt remove mpd
#CLONE / DOWNLOAD SOURCES
git clone https://github.com/MusicPlayerDaemon/MPD.git
#DEPENDENCIES
apt install meson g++ \
python3-sphinx \
libfmt-dev \
libpcre2-dev \
libmad0-dev libmpg123-dev libid3tag0-dev \
libflac-dev libvorbis-dev libopus-dev libogg-dev \
libadplug-dev libaudiofile-dev libsndfile1-dev libfaad-dev \
libfluidsynth-dev libgme-dev libmikmod-dev libmodplug-dev \
libmpcdec-dev libwavpack-dev libwildmidi-dev \
libsidplay2-dev libsidutils-dev libresid-builder-dev \
libavcodec-dev libavformat-dev \
libmp3lame-dev libtwolame-dev libshine-dev \
libsamplerate0-dev libsoxr-dev \
libbz2-dev libcdio-paranoia-dev libiso9660-dev libmms-dev \
libzzip-dev \
libcurl4-gnutls-dev libyajl-dev libexpat-dev \
libasound2-dev libao-dev libjack-jackd2-dev libopenal-dev \
libpulse-dev libshout3-dev \
libsndio-dev \
libmpdclient-dev \
libnfs-dev \
libupnp-dev \
libavahi-client-dev \
libsqlite3-dev \
libsystemd-dev \
libgtest-dev \
libicu-dev \
libchromaprint-dev \
libgcrypt20-dev libavformat-dev libavfilter-dev libavdevice-dev ffmpeg
#Change to SOURCES folder
cd MPD
#CONFIGURE
# Add "--reconfigure \" if options have changed
meson . output/release \
--prefix=/usr \
--sysconfdir=/etc \
--mandir=/usr/share/man \
--localstatedir=/var \
--buildtype=release \
-Dao=disabled \
-Daudiofile=disabled \
-Dbzip2=enabled \
-Dcdio_paranoia=disabled \
-Dchromaprint=disabled \
-Dcue=true \
-Dcurl=auto \
-Ddaemon=true \
-Ddatabase=true \
-Ddbus=enabled \
-Ddocumentation=enabled \
-Ddoxygen=false \
-Ddsd=true \
-Depoll=true \
-Deventfd=true \
-Dexpat=enabled \
-Dfaad=auto \
-Dffmpeg=enabled \
-Dfifo=true \
-Dflac=auto \
-Dfluidsynth=disabled \
-Dfuzzer=false \
-Dgme=disabled \
-Dhtml_manual=false \
-Dhttpd=false \
-Diconv=enabled \
-Dicu=enabled \
-Did3tag=auto \
-Dinotify=true \
-Dio_uring=auto \
-Dipv6=enabled \
-Diso9660=auto \
-Djack=enabled \
-Dlame=enabled \
-Dlibfuzzer=true \
-Dlibmpdclient=auto \
-Dlibsamplerate=enabled \
-Dlocal_socket=true \
-Dmad=disabled \
-Dmanpages=true \
-Dmikmod=disabled \
-Dmms=disabled \
-Dmodplug=disabled \
-Dmpcdec=auto \
-Dmpg123=auto \
-Dneighbor=false \
-Dnfs=auto \
-Dopenal=enabled \
-Dopenmpt=auto \
-Dopus=enabled \
-Doss=disabled \
-Dpcre=enabled \
-Dpipe=true \
-Dpipewire=auto \
-Dpulse=enabled \
-Dqobuz=disabled \
-Drecorder=false \
-Dshine=enabled \
-Dshout=enabled \
-Dsidplay=auto \
-Dsignalfd=true \
-Dsmbclient=auto \
-Dsnapcast=true \
-Dsndfile=disabled \
-Dsndio=enabled \
-Dsolaris_output=enabled \
-Dsoundcloud=disabled \
-Dsoxr=enabled \
-Dsqlite=enabled \
-Dsyslog=enabled \
-Dsystemd=auto \
-Dsystemd_system_unit_dir= \
-Dsystemd_user_unit_dir= \
-Dtcp=true \
-Dtest=false \
-Dtremor=auto \
-Dtwolame=auto \
-Dudisks=enabled \
-Dupnp=auto \
-Dvorbis=auto \
-Dvorbisenc=auto \
-Dwave_encoder=false \
-Dwavpack=enabled \
-Dwebdav=disabled \
-Dwildmidi=disabled \
-Dyajl=disabled \
-Dzeroconf=avahi \
-Dzlib=enabled \
-Dzzip=auto
#BUILD
ninja -C output/release
#INSTALL
ninja -C output/release install
Save and change flags:
~#chmod 755 buildmpd.sh
Launch the script:
~#./buildmpd
... normaly, everything well done, you've got a good MPD including libavfilter (futur use...)
DAC Detection
~# lsusb -t
/: Bus 07.Port 1: Dev 1, Class=root_hub, Driver=musb-hdrc/1p, 480M
/: Bus 06.Port 1: Dev 1, Class=root_hub, Driver=ohci-platform/1p, 12M
/: Bus 05.Port 1: Dev 1, Class=root_hub, Driver=ohci-platform/1p, 12M
|__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 1: Dev 2, If 1, Class=Human Interface Device, Driver=usbhid, 1.5M
/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=ehci-platform/1p, 480M
|__ Port 1: Dev 2, If 0, Class=Audio, Driver=snd-usb-audio, 480M
|__ Port 1: Dev 2, If 1, Class=Audio, Driver=snd-usb-audio, 480M
|__ Port 1: Dev 2, If 2, Class=Human Interface Device, Driver=usbhid, 480M
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=ehci-platform/1p, 480M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 5000M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 480M
DAC has been detected 👌
List Alsa devices
~#aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: allwinnerac200c [allwinner,ac200-codec], device 0: 508f000.i2s-acx00-dai acx00-codec-0 [508f000.i2s-acx00-dai acx00-codec-0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: Audio [USB2.0 High-Speed True HD Audio], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: sun9ihdmi [sun9i-hdmi], device 0: SUN9I-HDMI PCM i2s-hifi-0 [SUN9I-HDMI PCM i2s-hifi-0]
Subdevices: 1/1
Subdevice #0: subdevice #0
An other way to list sound cards
~# cat /proc/asound/cards
0 [allwinnerac200c]: simple-card - allwinner,ac200-codec
allwinner,ac200-codec
1 [Audio ]: USB-Audio - USB2.0 High-Speed True HD Audio
C-Media Electronics Inc. USB2.0 High-Speed True HD Audio at usb-5311000.usb-1,
2 [sun9ihdmi ]: sun9i-hdmi - sun9i-hdmi
sun9i-hdmi
Play some sound
card 1: Audio [USB2.0 High-Speed True HD Audio], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
Mean that your DAC is linked to :
- "card 1" mean hw 1
- "Subdevices: 1/1" mean only one device
- "Subdevice #0: subdevice #0" mean that this only device is the device 0
Trying the DAC
~#aplay -D hw:1,0 test.wav
Trying all devices ...
- On board sound chip [allwinner,ac200-codec] :
- ~#aplay -D hw:0,0 test.wav
- Or by using the name:
- ~#aplay -D CARD=allwinnerac200c,DEV=0 test.wav
- The DAC [USB2.0 High-Speed True HD Audio]
- ~#aplay -D hw:1,0 test.wav
- Or by using the name:
- ~#aplay -D CARD=Audio,DEV=0 test.wav
- HDMI screen speakers [sun9i-hdmi]
- ~#aplay -D hw:2,0 test.wav
- Or by using the name:
- ~#aplay -D CARD=sun9ihdmi,DEV=0 test.wav
Adding alsa equalizer in conf files
Setting up asound.conf
~#nano /etc/asound.conf
pcm.!default {
type asym
playback.pcm {
type plug
slave.pcm "usbdac"
}
capture.pcm {
type plug
slave.pcm "hw:allwinnerac200c,0"
}
}
ctl.!default {
type hw
card Audio
device 0
}
ctl.equal {
type equal
}
pcm.equaldac {
type equal
slave.pcm "plughw:Audio,0"
}
pcm.daqual {
type plug
slave.pcm equaldac
}
pcm.usbdac {
type softvol
slave.pcm "plughw:Audio,0"
control.name "Master"
control.card 0
}
Setting up audio output section in mpd.conf
#################################
######### AUDIO OUTPUTS #########
#################################
# Use resampling for smoother sound but heavy CPU load
resampler {
plugin "libsamplerate"
type "1"
}
# First prefered output
audio_output {
name "DAC Equ Resamp"
type "alsa"
device "plug:daqual"
format "176400:32:2"
auto_resample "no"
auto_format "yes"
enabled "yes"
mixer_type "software"
}
#
# Equalized DAC, no resamp
audio_output {
type "alsa"
name "DAC Equalized"
device "plug:daqual"
enabled "yes"
mixer_type "software"
}
# Only resampled no equalizer DAC (forced format)
audio_output {
type "alsa"
name "DAC"
device "hw:CARD=Audio,DEV=0"
format "176400:32:2"
auto_resample "no"
auto_format "no"
enabled "yes"
mixer_type "software"
}
# HDMI output for test
audio_output {
type "alsa"
name "HDMI"
device "hw:CARD=sun9ihdmi,DEV=0"
mixer_type "software"
}
