Infinite Guitar
The Infinite Guitar is a modified electric guitar created by Michael Brook, as a way of allowing a 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.

In addition to his own instrument, based on a Tokai copy of a Stratocaster, Brook produced two other Infinite Guitars. One belongs to Daniel Lanois, and the other belongs to The Edge of U2, who used it to record "With or Without You" from 1987's "The Joshua Tree". 

The principle has been the subject of patent litigation in the past, and is (or was) available commercially in several forms, including the Kramer Floyd Rose Sustainer, the Fernandes Sustainer and the Guitar Resonator. 

Additionally, it has been suggested that Michael Brook was inspired by the Holland Infinite Sustain Guitar introduced prior to his design. In 1978, guitarist Randy Roos and Steve Holland modified an SG guitar with a stainless steel fingerboard and infinite sustain device. The sustain device was patented by Steve Holland. The guitar can be heard on Randy Roos' recording "Mistral" which features Roos, Tony Levin and Mike Stern, among others. Similarly, musician and producer Jim O'Rourke has suggested that the concept did not originate with Brook, who refined previous similar designs by others.
Q78987
electric guitar
Concept
Q1349166
Michael Brook
PER
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Tokai
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Stratocaster
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Daniel Lanois
PER
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The Edge
PER
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U2
ORG
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With or Without You
MEDIA
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The Joshua Tree
MEDIA
Guitar Resonator
UNK
None
Randy Roos
UNK
Q285190
Steve Holland
ORG
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Tony Levin
PER
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Mike Stern
PER
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Jim O'Rourke
PER
Q17116668
Infinite Guitar
MEDIA
Q17116668
Infinite Guitar
MEDIA
1987-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1987
DATE
1978-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1978
DATE
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2
NUMBER
member of
composer
performer
part of
producer
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tracklist