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.. SPDX-License-Identifier: GPL-2.0+
.. Copyright 2022, Heinrich Schuchardt <xypron.glpk@gmx.de>
sound command
=============
Synopsis
--------
::
sound init
sound play [[len freq] ...] [len [freq]]
Description
-----------
The *sound* command is used to play one or multiple beep sounds.
sound init
initializes the sound driver.
sound play
plays a square wave sound. It does not depend on previously calling
*sound init*.
len
duration of the sound in ms, defaults to 1000 ms
freq
frequency of the sound in Hz, defaults to 400 Hz
Examples
--------
Beep at 400 Hz for 1000 ms::
sound play
Beep at 400 Hz for 600 ms::
sound play 600
Beep at 500 Hz for 600 ms::
sound play 600 500
Play melody::
sound play 500 1047 500 880 500 0 500 1047 500 880 500 0 500 784 500 698 500 784 1000 698
Configuration
-------------
The sound command is enabled by CONFIG_CMD_SOUND=y.
Return value
------------
The return value $? is 0 (true) if the command succeeds, 1 (false) otherwise.
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