Double concerto Piano, and Timpani" is commonly known by the title "Double Concerto," where the word "double" refers to the two string bodies rather than to the piano and timpani who are not soloists in the conventional sense. Concerti with more than two solo parts may be known by the terms "triple concerto" (Italian: "Concerto triplo", German: "Tripelkonzert"), "quadruple concerto," etc., but not usually when the instruments of the same type (e.g., Vivaldi's Concerto for Four Violins in B minor, catalogued as RV 580 and transcribed for four harpsichords by Bach as BWV 1065). One common arrangement for a triple concerto is
Owned-and-operated television stations in the United States Westinghouse to trade its NBC-affiliated Philadelphia cluster of KYW-AM (1060) and WPTZ-TV (channel 3) to NBC in exchange for WTAM-AM-FM and WNBK-TV in Cleveland. Westinghouse only agreed to the trade after NBC threatened not only to yank its programming from WPTZ, but also Westinghouse-owned WBZ-TV (channel 4) in Boston. NBC changed the callsigns of the Philadelphia stations to WRCV-AM-TV, while Westinghouse changed the Cleveland stations' callsigns to KYW-AM-FM-TV. NBC's then-ownership of Philadelphia's channel 3 was cited by CBS when it purchased its then-affiliate WCAU-TV in 1958, despite FCC rules at the time barring companies from owning stations with overlapping signals,