Rotor – a Rotary Speaker Rack Extension for Reason
Introducing Rotor, a rotary speaker Rack Extension from Propellerhead. Meticulously modeled on the Leslie 122, Rotor brings the sound of the classic rotary speaker design to Reason—perfect for adding a vintage flavor to organs, guitars, vocals and keys.
The Leslie speaker is a specially constructed amplifier/loudspeaker used to create special audio effects using the Doppler effect by rotating the speakers or a sound-directing duct. Named after its inventor, Donald Leslie, it is particularly associated with the Hammond organ but is used with a variety of instruments as well as vocals. The Hammond/Leslie combination has become an element in many genres of music. The Leslie Speaker and the Hammond Organ brands are currently owned by Suzuki Musical Instrument Corporation.
A rotary speaker simulator also known as a Leslie speaker simulator, is a device that attempts to recreate the sound of a Leslie speaker used extensively to amplify and modulate the raw organ tones produced by (though not exclusively) the tonewheel organs made by the Hammond Organ Company, and invented by Don Leslie.
While many analog devices have been touted as rotary speaker simulators, including but not limited to the Mini-Deja Vibe, Mojo Vibe, Rotosphere, Rotovibe, and Uni-Vibe, it was often only capable of simulating vibrato and at most chorus, despite the fact that a rotary speaker can also accomplish flanging, phase shifting, and even tremolo. This is because, instead of actually mimicking the way the sound wave is manipulated by the baffles of a Leslie Speaker cabinet (i.e. rotary speaker cabinet) and bounced around the cabinet, all the analog devices actually do is manipulate the signals themselves. Thus, the result is one that, though pleasant and interesting, is by no means similar to the sound produced by a Leslie.