EnglishFrenchSpanish

OnWorks favicon

alsabat - Online in the Cloud

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

This is the command alsabat 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


alsabat - command-line sound tester for ALSA sound card driver

SYNOPSIS


alsabat [flags]

DESCRIPTION


ALSABAT(ALSA Basic Audio Tester) is a simple command-line utility intended to help
automate audio driver and sound server testing with little human interaction. ALSABAT can
be used to test audio quality, stress test features and test audio before and after PM
state changes.

ALSABAT's design is relatively simple. ALSABAT plays an audio stream and captures the same
stream in either a digital or analog loop back. It then compares the captured stream using
a FFT to the original to determine if the test case passes or fails.

ALSABAT can either run wholly on the target machine being tested (standalone mode) or can
run as a client/server mode where by alsabat client runs on the target and runs as a
server on a separate tester machine. The client/server mode still requires some manual
interaction for synchronization, but this is actively being developed for future releases.

The hardware testing configuration may require the use of an analog cable connecting
target to tester machines or a cable to create an analog loopback if no loopback mode is
not available on the sound hardware that is being tested. An analog loopback cable can be
used to connect the "line in" to "line out" jacks to create a loopback. If only headphone
and mic jacks (or combo jack) are available then the following simple circuit can be used
to create an analog loopback :-

https://source.android.com/devices/audio/loopback.html

OPTIONS


-h, --help
Help: show syntax.

-D Select sound card to be tested by name.

-P Select the playback PCM device.

-C Select the capture PCM device.

-f Sample format
Recognized sample formats are: U8 S16_LE S24_3LE S32_LE
Some of these may not be available on selected hardware
The available format shortcuts are:
-f cd (16 bit little endian, 44100, stereo) [-f S16_LE -c2 -r44100]
-f dat (16 bit little endian, 48000, stereo) [-f S16_LE -c2 -r48000]
If no format is given S16_LE is used.

-c The number of channels. The default is one channel. Valid values at the moment are
1 or 2.

-r Sampling rate in Hertz. The default rate is 44100 Hertz. Valid values depends on
hardware support.

-n Duration of generated signal. The value could be either of the two forms:
1. Decimal integer, means number of frames;
2. Floating point with suffix 's', means number of seconds.
The default is 2 seconds.

-k Sigma k value for analysis.
The analysis function reads data from WAV file, run FFT against the data to get
magnitude of frequency vectors, and then calculates the average value and standard
deviation of frequency vectors. After that, we define a threshold:
threshold = k * standard_deviation + mean_value
Frequencies with amplitude larger than threshold will be recognized as a peak, and
the frequency with largest peak value will be recognized as a detected frequency.
ALSABAT then compares the detected frequency to target frequency, to decide if the
detecting passes or fails.
The default value is 3.0.

-F Target frequency for signal generation and analysis, in Hertz. The default is
997.0 Hertz. Valid range is (DC_THRESHOLD, 40% * Sampling rate).

-p Total number of periods to play or capture.

--log=#
Write stderr and stdout output to this log file.

--file=#
Input WAV file for playback.

--saveplay=#
Target WAV file to save capture test content.

--local
Internal loopback mode. Playback, capture and analysis internal to ALSABAT only.
This is intended for developers to test new ALSABAT features as no audio is routed
outside of ALSABAT.

EXAMPLES


alsabat -P plughw:0,0 -C plughw:0,0 -c 2 -f S32_LE -F 250
Generate and play a sine wave of 250 Hertz with 2 channel and S32_LE format, and
then capture and analyze.

alsabat -P plughw:0,0 -C plughw:0,0 --file 500Hz.wav
Play the RIFF WAV file "500Hz.wav" which contains 500 Hertz waveform LPCM data, and
then capture and analyze.

RETURN VALUE


On success, returns 0.
If no peak be detected, returns -1001;
If only DC be detected, returns -1002;
If peak frequency does not match with the target frequency, returns -1003.

Use alsabat 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