Polyphony and monophony in instruments harpejji and the Chapman stick). Multiphonics can be used with many regular wind instruments to produce two or more notes at once, although this is considered an extended technique. Explicitly polyphonic wind instruments are relatively rare, but do exist. The standard harmonica can easily produce several notes at once. Multichambered ocarinas are manufactured in a number of varieties, including double, triple, and quadruple ocarinas, which use multiple chambers to extend the ocarina's otherwise limited range, but also enable the musician to play more than one note simultaneously. Harmonic ocarinas are specifically designed for polyphony, and in these instruments the range
Owned-and-operated television stations in the United States network chose to affiliate with Westinghouse's KYW-TV, Philadelphia's longtime NBC affiliate. After a bidding war, WCAU was sold to NBC. KYW became a CBS owned-and-operated station after Westinghouse's merger with CBS a few months later. As part of the same deal, NBC in turn transferred its own O&O stations in Denver (KCNC-TV, channel 4) and Salt Lake City (KUTV) to Westinghouse/CBS, and those stations became CBS O&Os after Westinghouse merged with CBS. NBC and CBS also swapped transmitting facilities in Miami between the then-weaker CBS-owned WCIX (channel 6, now WFOR-TV, channel 4) and the then-stronger NBC-owned WTVJ (channel 4, now