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nxbelld, a fork of xbelld, the X bell daemon for computers w/o a PC speaker.

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dusxmt/nxbelld

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Summary:

    nxbelld is a tiny utility to aid people who either don't like the default
    PC speaker beep, or use a sound driver that doesn't have support for the
    PC speaker (e.g. the AD1981 chipset in the snd_hda_intel ALSA driver,
    as of 2008-04-06).

    nxbelld performs a given action every time the X bell is rung.  The actions
    nxbelld can currently perform include running a specified program, emulating
    the PC speaker beep using your sound card (default), or playing a PCM
    encoded WAVE file.

    The actions involving the sound card are only available if nxbelld is
    compiled with sound support, which requires a supported sound API.

    Currently, the following sound APIs are supported:

        ALSA    (default on most Linux distributions)
        OSS     (default on several BSD systems, including FreeBSD)
        sndio   (default on OpenBSD)

    To convert your favorite sound files to a PCM encoded WAVE file, use:

        ffmpeg -i <file> -vn -acodec pcm_s16le out.wav

    nxbelld can also throttle the bell if it is rung too often (e.g. some
    terminal program goes crazy), and/or disable the system's audible bell (so
    that you don't get the annoying PC speaker beep in addition to your
    nxbelld action). 


    You can get an up-to-date version of nxbelld from the following repository:
    https://github.com/dusxmt/nxbelld

    nxbelld is a fork of xbelld.  You can find the original project here:
    https://gitlab.com/gi1242/xbelld


Compiling and installing:

    For generic installation instructions, see the INSTALL file.

    In case you've gotten nxbelld from a git repository, in order to generate
    the missing build system files, run:  autoreconf -vfi


Dependencies:

    Required for compiling:
        pkg-config >= 0.9.0
        X11

    At least one of the following APIs is recommended to be present:
        ALSA
        OSS
        sndio

    Required for bootstrapping from git:
        autoconf   >= 2.69
        automake   >= 1.11.6
        pod2man

    Required for "make dist" from a git tree:
        perl


Notes:

    When using sndio, the beeps are slightly shorter than the specified beep
    duration.  Beeps of 120ms or shorter don't get played at all.  This can be
    worked around simply by specifying a longer duration using the --duration
    option.