解決USB DAC PCM2912A在Ubuntu 20.04.4 LTS爆音問題

參考了連結

https://community.linuxmint.com/tutorial/view/2401

sudo vi /etc/pulse/daemon.conf

daemonize = no
system-instance = no
enable-shm = no
cpu-limit = no

high-priority = yes
nice-level = -11

realtime-scheduling = yes
realtime-priority = 5

exit-idle-time = -1

default-script-file = /etc/pulse/default.pa

resample-method = copy
enable-remixing = yes
lfe-crossover-freq = 0

flat-volumes = yes

rlimit-nice = 31
rlimit-rtprio = 9
rlimit-rttime = 200000

default-sample-format = s32le
default-sample-rate = 96000
alternate-sample-rate = 48000
default-sample-channels = 2
default-channel-map = front-left,front-right

default-fragments = 2
default-fragment-size-msec = 50

deferred-volume-safety-margin-usec = 8000

修改存檔後重新開機