Description:

gnubeep is a simple program written in C to generate `beeps`
by programming the system's internal PIT (programmable interrupt
timer) directly via the I/O ports. I have so many times needed to
generate custom tones in shell scripts and programs, and when '\a'
doesn't suffice, this can be a problem which requires overcoming.
For this reason, I decided to write gnubeep.

One of the prime reasons I saw fit to release this piece of software
was to serve as an example of how to program the PIT for sound in Linux.

Note: you need to be root to run it or change permission yourself
by running chmod +s /usr/bin/gnubeep