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Raspberry pi (raspbian stretch) + USB speaker

raspberry pi

pi@raspberrypi:~ $ dpkg -l | grep gmedia

ii  gmediarender                                                0.0.7~git20160329+repack-1                  armhf        Small headless UPnP media renderer

 

pi@raspberrypi:~ $ cat /etc/default/gmediarender

# Configuration for gmediarender

 

#Start daemon automatically? (1= yes, all other valures are "not enabled")

# defaults to "not enabled"

ENABLED=1

 

# User and group the daemon will be running as.

#DAEMON_USER="nobody:audio"

DAEMON_USER="root:root"

 

# Device name as it will be advertised to and shown in the UPnP controller UI.

# Some string that helps you recognize the player, e.g. "Livingroom Player"

UPNP_DEVICE_NAME="gmediarender on $(hostname)"

 

# Initial volume in decibel. 0.0 is 'full volume', -10 correspondents to '75' on

# the exported volume scale (Note, this does not change the ALSA volume, only

# internal to gmrender. So make sure to leave the ALSA volume always to 100%).

INITIAL_VOLUME_DB=-10

 

# If you explicitly choose a specific ALSA device here (find them with 'aplay -L'), then

# gmediarenderer will use that ALSA device to play audio.

# Otherwise, whatever default is configured for gstreamer for the '$DAEMON_USER' is

# used.

#ALSA_DEVICE="sysdefault"

ALSA_DEVICE="hw:1,0"

#ALSA_DEVICE="iec958"

 

# You can pass extra arguments to the daemon

# For example, you can specify a logfile with this line

# (though you need to ensure correct permissions for a log file yourself.)

DAEMON_EXTRA_ARGS="--logfile /var/log/gmediarender.log"