http://en.wikipedia.org/wiki/Infinite_guitar The Infinite Guitar was created by Michael Brook, as a way of allowing an electric guitar note to be held with infinite sustain (hence the name). It consists of an electronic circuit that takes the signal from a standard guitar pickup, amplifies it, and feeds it back into a separate pickup coil. When set up and used correctly, the result is a continuous sustained note that can be used as is, or treated to create new sounds or emulate traditional instruments. Infinite Guitar 是 Michael Brook先生发明的 主要是藉由电子扩大机将一段旋律 加强之後放回原来的旋律中的一种技巧 造成一种无限回旋的效果 用得好的话 可以无限延长某个音 或是模拟某些传统的乐器 In addition to his own instrument, based on a Tokai Strat copy, Brook produced two Infinite Guitars, one of which belongs to Daniel Lanois. The other belongs to The Edge of U2, who famously used it on "With or Without You" from 1987's The Joshua Tree. Michael Brook先生打造了两把Infinite Guitar 一把给了Daniel Lanois 一把给了The Edge The Edge後来在With or Without You中应用这个技巧 (就是曲子一开始 听到的一个很长的电子吉他的音 曲子进行中也多次出现) The principle has been the subject of patent litigation in the past, and is currently available commercially in several forms, including the EBow, the Sustainiac and the Fernandes Sustainer. There seems to be no historical indication of how familiar Brook or the developers of other sustaining devices were with The Gizmo, a mechanical device developed in the mid-1970's by Godley & Creme that also provided similar effects. 这个技巧曾经有过专利 但是後来以许多其他不同的形式出现在各种的乐曲中 在1970年代中期 Godley & Creme 发明的 The Gizmo 也具有类似的功能 看U2版长知识 (我也是现在才知道.....) -- 每个人心中都有一座地下铁，通向一个叫做希望的出口。 然而，为了爱，他们却在拥挤的车厢迷失方向，不断的坐错车， 一再的下错车，常常迷路，常常失落，常常受伤。 不过幸好，他们恢复的快...... --

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