Compaq Armada 1700 Reference Manual page 103

Audio volume control affects the stereo speakers, headphones, and
external speakers that are connected to the stereo
speaker/headphone jack.
There are three ways to control the audio volume:
Using volume control buttons on the left side of the computer.
The rear button turns up the volume. The forward button turns
down the volume. To mute sound completely, press both
volume buttons simultaneously.
Using volume control features available under the Audio tab
in Multimedia Properties.
Using the
warning beeps).
Some software applications, such as game programs, include their
own volume controls. You may need to use the software to adjust
volume to the desired sound level.
The volume control on the computer overrides all other volume
controls in the software. That is, the volume from the integrated
stereo speakers, external speakers, or headphones will never be
louder than the sound level selected using the computer volume
control.
hotkeys (adjusts only the volume of system