sound command

Synopsis

sound init
sound play [[len freq] ...] [len [freq]]

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

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

The sound command is enabled by CONFIG_CMD_SOUND=y.

The return value $? is 0 (true) if the command succeeds, 1 (false) otherwise.