a simple BitPerfect player
- FLAC (Free Lossless Audio Codec)
- WAV (RIFF waveform Audio Format)
- MP3 (MPEG-1 Audio Layer-3)
- Ogg Vorbis
- AAC (mp4/m4a)
# dnf install alsa-lib-devel
$ make
$ make
$ ./aplay -h
Usage: ./aplay [options] dir
Options:
-h Print this message
-d <device name> ALSA device name [default hw:0,0 plughw:0,0...]
-f Use 32bit floating
-r Recursively search for directory
-x Random play
-s <regexp> Search files
-t <ext type> File type [flac mp3 wma...]
-p Tuning for Linux platforms
$ ./aplay -rx .
$ ./aplay -rx -d hw:7,0 /Music/ -s ZARD
$ ./aplay -rfx -d hw:7,0 /Music/ -s '^(?!.*nstrumental).*$'- Disk I/O
vm.dirty_ratio = 40
vm.dirty_background_ratio = 10
vm.dirty_expire_centisecs = 3000
vm.dirty_writeback_centisecs = 500
#dev.hpet.max-user-freq = 3072
vm.overcommit_memory = 1
sysctl -p
- scheduler
#!/bin/sh
#cat /sys/block/sd*/queue/scheduler
for FILE in /sys/block/sd*/queue/scheduler
do
[ -f $FILE ] || continue
echo -n none > $FILE
done
# scheduler for non rotational, SSD
ACTION=="add|change", KERNEL=="sd[a-z]|mmcblk[0-9]*", ATTR{queue/rotational}=="0", ATTR{queue/scheduler}="none"
# scheduler for rotational, HDD
ACTION=="add|change", KERNEL=="sd[a-z]", ATTR{queue/rotational}=="1", ATTR{queue/scheduler}="bfq"
fstrim -v /
- Setting CPU clock to performance
#!/bin/sh
#cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
for CPUFREQ in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
do
[ -f $CPUFREQ ] || continue
echo -n performance > $CPUFREQ
done
- Timer
#cat /sys/devices/system/clocksource/clocksource0/current_clocksource
echo tsc > /sys/devices/system/clocksource/clocksource0/current_clocksource
ulimit -a