Each time the PC boots and I pop in the Debian DVD into the DVD tray, it emits a blaring sound. I know the sound is emitting from the speaker inside of the PC but short of pulling it out or disable it via the BIOS, can I disable it in any other way as no sounds are heard when I boot with say Fedora, Ubuntu, etc?
The pc speaker is usually being handled by a kernel module named pcspkr. To unload this module manually you can try
Of course, you need to do it as root (or through sudo).
To make this persistent, you could add the line
to a file in /etc/modprobe.d/
Disabling the pc speaker from BIOS is probably overkill, since those BIOS beeps are a valuable source of information when debugging hardware issues.