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
Gems TV (USA) reason of increasing profit margins. This was one of the principles the company was originally well known for - Going direct to the mines and handcrafting gem set jewelry in their own in-house facilities. The consequence of this has resulted in a large number of redundancies. DirecTV has filed a lawsuit against Gems TV (USA) Limited, claiming that Gems TV refused to pay their satellite bills. Gems TV (USA) Gems TV was an American reverse auction jewelry shopping channel. The channel was available on DirecTV, Dish Network and other local networks. The channel operations were based in Reno, Nevada. Gems