![]() ![]() ![]() It soon became an essential tool for most jazz organists. The sound of the organ being played through his speaker received national radio exposure across the US, and it became a commercial and critical success. Hammond was not interested in marketing or selling the speakers, so Leslie sold them himself as an add-on, targeting other organs as well as Hammond. The speaker is named after its inventor, Donald Leslie, who began working in the late 1930s to get a speaker for a Hammond organ that better emulated a pipe or theatre organ, and discovered that baffles rotating along the axis of the speaker cone gave the best sound effect. A musician controls the Leslie speaker by either an external switch or pedal that alternates between a slow and fast speed setting, known as " chorale" and " tremolo". A typical Leslie speaker contains an amplifier, a treble horn and a bass speaker-though specific components depend upon the model. It is most commonly associated with the Hammond organ, though it was later used for the electric guitar and other instruments. A similar effect is provided by a rotating system of horns in front of the treble driver. The Leslie speaker is a combined amplifier and loudspeaker that projects the signal from an electric or electronic instrument and modifies the sound by rotating a baffle chamber ("drum") in front of the loudspeakers. Problems playing this file? See media help. ![]()
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