This is a measure of the amount of interference coming from neighboring pit tracks on a CD. As track pitch is tightened (when tracks are packed closer together to put more data on a disc), cross-talk increases. A maximum value of 50% is allowed by Red Book specifications.

Unwanted breakthrough of one channel into another. Also refers to the distortion that occurs when some signal from a music source that you are not listening to leaks into the circuit of the source that you are listening to.

A signal leak from one channel to another - often the cause of noise and distortion.

In audio, the leakage of a signal from one channel of a system to another. A system with low cross-talk will have good separation between channels. In a stereo audio program, a separation of 20 dB (100:1) should be adequate, although in some professional applications a level of up to 60 dB may be required. In video recorders and disc players, the leakage of a signal from one track to an adjacent track.