Editing Musique concrète (section)

====Morphophone====
[[File:Morphophone.JPG|upright|thumb|left|The Morphophone]]
This machine was conceived to build complex forms through repetition, and accumulation of events through [[Delay (audio effect)|delays]], filtering and [[feedback]]. It consisted of a large rotating disk, 50&nbsp;cm in diameter, on which was stuck a tape with its magnetic side facing outward. A series of twelve movable [[tape head|magnetic heads]] (one each [[recording head]] and erasing head, and ten playback heads) were positioned around the disk, in contact with the tape. A sound up to four seconds long could be recorded on the looped tape and the ten playback heads would then read the information with different delays, according to their (adjustable) positions around the disk. A separate [[amplifier]] and [[band-pass filter]] for each head could modify the [[sound spectrum|spectrum]] of the sound, and additional feedback loops could transmit the information to the recording head. The resulting repetitions of a sound occurred at different time intervals, and could be filtered or modified through feedback. This system was also easily capable of producing artificial reverberation or continuous sounds.<ref name="Teruggi-2007-p218"/>