Phil Spector was an important record producer in the early 1960's. His claim to fame was a sound called the "wall of sound" which was basically a whole lot of different instruments in the background of a song, described by one web site as "a multitracked, overdubbed aural symphony Phil used as the smorgasbord to highlight his singers." The article on Phil in the R&R Hall of Fame says "The chief ingredients in the Wall of Sound -- a massive and cavernous roar created by the fusing of many individual instruments -- were maximum volume and liberal use of echo."

The point being that there is no point in the song where there is just silence, and few where just one instrument is playing. Hence, "wall of sound."

He produced the Ronettes (which starred his wife Ronnie Spector), the Crystals, and the Righteous Brothers (where the "wall" was a bit more subdued), and other lesser acts.

Alex
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