Using The Internal Speakers - HP 345561-001 Startup And Reference Manual

Using the Internal Speakers

The internal speakers play sound in stereo from applications, the
operating system, games, drive media, the Internet, and other
sources.
If an external device, such as a headset, is connected to the
audio-out jack, the internal speakers are disabled.
Identifying the internal speakers
Startup and Reference Guide—Part 2
Multimedia
6–3