EnglishFrenchSpanish

OnWorks favicon

alsaloop - Online in the Cloud

Run alsaloop in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command alsaloop that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

NAME


alsaloop - command-line PCM loopback

SYNOPSIS


alsaloop [-option] [cmd]

DESCRIPTION


alsaloop allows create a PCM loopback between a PCM capture device and a PCM playback
device.

alsaloop supports multiple soundcards, adaptive clock synchronization, adaptive rate
resampling using the samplerate library (if available in the system). Also, mixer controls
can be redirected from one card to another (for example Master and PCM).

OPTIONS


-h | --help

Prints the help information.

-g <file> | --config=<file>

Use given configuration file. The syntax of this file is simple: one line contains
the command line options for one job. The '#' means comment and rest of line is
ignored. Example:

# First line - comment, second line - first job
-C hw:1,0 -P hw:0,0 -t 50000 -T 1
# Third line - comment, fourth line - second job
-C hw:1,1 -P hw:0,1 -t 40000 -T 2

-d | --daemonize

Daemonize the main process and use syslog for messages.

-P <device> | --pdevice=<device>

Use given playback device.

-C <device> | --cdevice=<device>

Use given capture device.

-X <device> | --pctl=<device>

Use given CTL device for playback.

-Y <device> | --cctl=<device>

Use given CTL device for capture.

-l <latency> | --latency=<frames>

Requested latency in frames.

-t <usec> | --tlatency=<usec>

Requested latency in usec (1/1000000sec).

-f <format> | --format=<format>

Format specification (usually S16_LE S32_LE). Use -h to list all formats. Default
format is S16_LE.

-c <channels> | --channels=<channels>

Channel count specification. Default value is 2.

-c <rate> | --rate=<rate>

Rate specification. Default value is 48000 (Hz).

-n | --resample

Allow rate resampling using alsa-lib.

-A <converter> | --samplerate=<converter>

Use libsamplerate and choose a converter:

0 or sincbest - best quality
1 or sincmedium - medium quality
2 or sincfastest - lowest quality
3 or zerohold - hold zero samples
4 or linear - worst quality - linear resampling
5 or auto - choose best method

-B <size> | --buffer=<size>

Buffer size in frames.

-E <size> | --period=<size>

Period size in frames.

-s <secs> | --seconds=<secs>

Duration of loop in seconds.

-b | --nblock

Non-block mode (very early process wakeup). Eats more CPU.

-S <mode> | --sync=<mode>

Sync mode specification for capture to playback stream:
0 or none - do not touch the stream
1 or simple - add or remove samples to keep
both streams synchronized
2 or captshift - use driver for the capture device
(if supported) to compensate
the rate shift
3 or playshift - use driver for the playback device
(if supported) to compensate
the rate shift
4 or samplerate - use samplerate library to do rate resampling
5 or auto - automatically selects the best method
in this order: captshift, playshift,
samplerate, simple

-T <num> | --thread=<num>

Thread number (-1 means create a unique thread). All jobs with same thread numbers
are run within one thread.

-m <mixid> | --mixer=<midid>

Redirect mixer control from the playback card to the capture card. Format of mixid
is SRCID(PLAYBACK)[@DSTID(PLAYBACK)]:

"name='Master Playback Switch'@name='Another Switch'"
"name='PCM Playback Volume'"

Known attributes:

name - control ID name
index - control ID index
device - control ID device
subdevice - control ID subdevice
iface - control ID interface
numid - control ID numid

-O <ossmixid> | --ossmixer=<midid>

Redirect mixer control from the OSS Mixer emulation layer (capture card) to the
ALSA layer (capture card). Format of ossmixid is ALSAID[,INDEX]@OSSID:

"Master@VOLUME"
"PCM,1@ALTPCM"

Known OSS attributes:

VOLUME, BASS, TREBLE, SYNTH, PCM, SPEAKER, LINE, MIC, CD, IMIX, ALTPCM,
RECLEV, IGAIN, OGAIN, LINE1, LINE2, LINE3, DIGITAL1, DIGITAL2, DIGITAL3,
PHONEIN, PHONEOUT, VIDEO, RADIO, MONITOR

-v | --verbose

Verbose mode. Use multiple times to increase verbosity.

-U | --xrun

Verbose xrun profiling.

-W <timeout> | --wake=<timeout>

Set process wake timeout.

EXAMPLES


alsaloop -C hw:0,0 -P hw:1,0 -t 50000

Use alsaloop online using onworks.net services


Free Servers & Workstations

Download Windows & Linux apps

  • 1
    Eclipse Checkstyle Plug-in
    Eclipse Checkstyle Plug-in
    The Eclipse Checkstyle plug-in
    integrates the Checkstyle Java code
    auditor into the Eclipse IDE. The
    plug-in provides real-time feedback to
    the user about viol...
    Download Eclipse Checkstyle Plug-in
  • 2
    AstrOrzPlayer
    AstrOrzPlayer
    AstrOrz Player is a free media player
    software, part based on WMP and VLC. The
    player is in a minimalist style, with
    more than ten theme colors, and can also
    b...
    Download AstrOrzPlayer
  • 3
    movistartv
    movistartv
    Kodi Movistar+ TV es un ADDON para XBMC/
    Kodi que permite disponer de un
    decodificador de los servicios IPTV de
    Movistar integrado en uno de los
    mediacenters ma...
    Download movistartv
  • 4
    Code::Blocks
    Code::Blocks
    Code::Blocks is a free, open-source,
    cross-platform C, C++ and Fortran IDE
    built to meet the most demanding needs
    of its users. It is designed to be very
    extens...
    Download Code::Blocks
  • 5
    Amidst
    Amidst
    Amidst or Advanced Minecraft Interface
    and Data/Structure Tracking is a tool to
    display an overview of a Minecraft
    world, without actually creating it. It
    can ...
    Download Amidst
  • 6
    MSYS2
    MSYS2
    MSYS2 is a collection of tools and
    libraries providing you with an
    easy-to-use environment for building,
    installing and running native Windows
    software. It con...
    Download MSYS2
  • More »

Linux commands

  • 1
    a56
    a56
    A56 - Motorola DSP56001 assembler ...
    Run a56
  • 2
    a68g
    a68g
    a68g - Algol 68 Genie, an Algol 68
    compiler-interpreter ...
    Run a68g
  • 3
    copt
    copt
    copt - peephole optimizer SYSNOPIS:
    copt file.. DESCRIPTION: copt is a
    general-purpose peephole optimizer. It
    reads code from its standard input and
    writes an ...
    Run copt
  • 4
    copydatabase-1.3
    copydatabase-1.3
    copydatabase - Perform a
    document-by-document copy of one or more
    Xapian databases ...
    Run copydatabase-1.3
  • 5
    fweelin
    fweelin
    freewheeling � live looping musical
    instrument ...
    Run fweelin
  • 6
    fwexec
    fwexec
    fwexec - program to upload and rexecute
    image file to a connected NXT device ...
    Run fwexec
  • More »

Ad