Digital signal processing (DSP) is the use of digital processing, such as by computers, to perform a wide variety of signal processing operations. The signals processed in this manner are a sequence of numbers that represent samples of a continuous variable in a domain such as time, space, or frequency.
That it took nearly a year to record Voulez-Vous is an indicator of the creative and personal box in which the four members of ABBA found themselves at the end of the '70s. Their sixth album coincided with the marital split between Agnetha Fältskog and Björn Ulvaeus and the massively shifting currents in popular music, with disco, which had been on the wane, suddenly undergoing a renaissance thanks to the 1977 movie Saturday Night Fever.
ABBA's fourth album appeared after the group had arrived as major stars shows the quartet at the absolute top of their game. In addition to "Dancing Queen," which is probably their best-known hit (a number one single on both sides of the Atlantic), the record was filled with brilliant material, including the spirited "When I Kissed the Teacher"; the dramatic, achingly beautiful "Knowing Me, Knowing You" (yet a further hit); the pounding "Money, Money, Money" (still another hit off the album); and the playful "That's Me."