How would you react if booming voice boomed through your speakers and berated you for pirating? The music industry is conidering whether to adopt a new invention which buries around 20 kilobits of speech data in a waveform without affecting how it sounds. "Their technique exploits the fact that the tones of a musical instrument are made up of a complex pattern of randomly phased harmonics.
By forcing a few of these harmonics to move in and out of phase with a chosen reference, they can be made to convey a digital message. These phase shifts are so small they are imperceptible to the ear. But a software decoder, which could be built into software players, detects the phase shifts and turns them into speech."
Imaging sample pirates getting a loud warning "STOP YOU THIEF! YOU ARE STEALING THESE SOUNDS! YOU WILL NOW BE INFLICTED WITH INCESSANT DISCO YODELING!" Maybe Bruce Richardson or NewMusicBoy can do the yodeling
This is one of the better copy protection schemes I've heard of to date.