With simple controls that hide a wide array of tweakable options, the RotoChoir by Tech 21 recreates the multi-dimensional tone of a vintage rotating speaker cabinet. Using SansAmp technology, the RotoChoir emulates both the rotating lower speaker and the treble rotor horn to build complexity of tone. The RotoChoir allows you to sculpt tube amp tone, control the speed of the rotating speaker, direct record, and more all in one lush-sounding package.