Editing Output device (section)

==== PC speaker ====
{{main|PC speaker}}

The ''PC speaker'' is a simple loudspeaker built into [[IBM PC]] compatible computers. Unlike a speaker used with a sound card, the PC speaker is only meant to produce [[Square wave (waveform)|square wave]]s to produce sounds such as [[beep (sound)|beeping]].

Modern computers utilize a [[piezoelectric speaker|piezoelectric buzzer]] or a small speaker as the PC speaker.

PC speakers are used during [[Power-on self-test#Progress and error reporting|Power-on self-test]] to identify errors during the computer's boot process, without needing a video output device to be present and functional.