What is "anchor point"

In audio and recording, what is known colloquially as an anchor point is a center position in a stereo mix reserved for only three or four important tracks. Most modern pop productions are anchored by lead ( vocals and soloing instruments), bass, kick drum, and snare drum. These are usually within a few degrees of center (horizontal) and front (proximity or depth) in the mix. Exceptions include early stereo recordings using "stereo-switching" (a three-way switch allowing only left output, right output, or both) rather than pan pots) such as the Beatles's " Strawberry Fields Forever" and Jimi Hendrix's " Purple Haze". Examples of tracks using anchor points include The Breeders's " Cannonball", The Cure's " Catch", Lady Gaga's " Just Dance", Lily Allen's " The Fear", Radiohead's " Airbag", Squarepusher's " Star Time 2", Stone Roses's " One Love", and Weezer's " My Name Is Jonas".