Phil Spector's wall of sound wasn't dynamically compressed. It was
actually a room full of musicians. When I look at a picture of a
recording session, that studio is *crowded*. Dynamic compression in
those days involved doing things like controlling the levels by using a
light bulb to illuminate a light dependent resistor. From Wikilies. :-
"To attain the Wall of Sound, Spector's arrangements called for large
ensembles (including some instruments not generally used for ensemble
playing, such as electric and acoustic guitars), with multiple
instruments doubling or tripling many of the parts to create a fuller,
richer tone. For example, Spector often duplicated a part played by an
acoustic piano with an electric piano and a harpsichord. Mixed well
enough, the three instruments would then be indistinguishable to the
listener."
The pumping you hear on many stations now is usually an Orban Optimod
type device, either sitting between the studio and the transmitter or
implemented in the studio software, with a limiter on the transmitter input.
--
Tciao for Now!
John.