Drop Down MenusCSS Drop Down MenuPure CSS Dropdown Menu


alsaloop -V (return code: 1)

alsaloop: unrecognized option '--version'
ALSA lib pcm_hw.c:1700:(_snd_pcm_hw_open) Invalid value for card
playback hw:0,0 open error: No such file or directory
Loopback initialization failure.
alsaloop --help (return code: 0)

Usage: alsaloop [OPTION]...

-h,--help      help
-g,--config    configuration file (one line = one job specified)
-d,--daemonize daemonize the main process and use syslog for errors
-P,--pdevice   playback device
-C,--cdevice   capture device
-X,--pctl      playback ctl device
-Y,--cctl      capture ctl device
-l,--latency   requested latency in frames
-t,--tlatency  requested latency in usec (1/1000000sec)
-f,--format    sample format
-c,--channels  channels
-r,--rate      rate
-n,--resample  resample in alsa-lib
-A,--samplerate use converter (0=sincbest,1=sincmedium,2=sincfastest,
-B,--buffer    buffer size in frames
-E,--period    period size in frames
-s,--seconds   duration of loop in seconds
-b,--nblock    non-block mode (very early process wakeup)
-S,--sync      sync mode(0=none,1=simple,2=captshift,3=playshift,4=samplerate,
-a,--slave     stream parameters slave mode (0=auto, 1=on, 2=off)
-T,--thread    thread number (-1 = create unique)
-m,--mixer redirect mixer, argument is:
-O,--ossmixer rescan and redirect oss mixer, argument is:
      ALSA_ID@OSS_ID  (for example: "Master@VOLUME")
-e,--effect    apply an effect (bandpass filter sweep)
-v,--verbose   verbose mode (more -v means more verbose)
-w,--workaround use workaround (serialopen)
-U,--xrun      xrun profiling
-W,--wake      process wake timeout in ms
-z,--syslog    use syslog for errors

Recognized sample formats are: S8 U8 S16_LE S16_BE U16_LE U16_BE S24_LE S24_BE U24_LE U24_BE S32_LE S32_BE U32_LE U32_BE FLOAT_LE FLOAT_BE FLOAT64_LE FLOAT64_BE IEC958_SUBFRAME_LE IEC958_SUBFRAME_BE MU_LAW A_LAW IMA_ADPCM MPEG GSM SPECIAL S24_3LE S24_3BE U24_3LE U24_3BE S20_3LE S20_3BE U20_3LE U20_3BE S18_3LE S18_3BE U18_3LE U18_3BE G723_24 G723_24_1B G723_40 G723_40_1B DSD_U8 DSD_U16_LE DSD_U32_LE DSD_U16_BE

Tip #1 (usable 500ms latency, good CPU usage, superb xrun prevention):
  alsaloop -t 500000
Tip #2 (superb 1ms latency, but heavy CPU usage):
  alsaloop -t 1000


Popular posts from this blog

PostgreSQL pgBadger

PostgreSQL Pgbadger Installation On Linux

Script to kill ALL IDLE Connection In postgreSQL

How To Schedule PostgreSQL Jobs using pgAgent on Linux plateform

How to configure Replication Manager (repmgr) ?