This sounds like fun!
Whistle while you work: Use the open source sndpeek program and a simple Perl script to read specific sequences of tonal events — literally whistling or humming at your computer — and run commands based on those tones.
I can just imagine the “Star Trek XXXIV: Superfluous” movie scene now, with the brand spanking new Enterprise, the NCC-1701-ZZXYZ.
Lieutenant Atad: Snognilk on the bridge!
Captain Dracip: Commander Rekir, set the auto-destruct sequence on the main computer, quick!
** Commander Rekir begins whistling the tune from “Bridge Over The River Kwai” a.k.a. “Colonel Bogey March” **