Abstract: An electronic musical instrument includes a platter, rotational position sensor, and a processor. The platter can be rotated about a center point by a user. The rotational position sensor senses rotation of the platter and provides a position signal indicative of the sense rotation of the platter. The buffer stores a sound sample. The processor receives the position signal from the rotational position sensor, determines a rotational position of the platter as a function of the position signal, retrieves a sound sample from a buffer, shifts a frequency of the sound sample as a function of the determined rotational position of the platter, and renders the frequency-shifted sound sample. The instrument may also include user inputs for selecting octaves per rotation and scale divisions within each octave which further define the frequency shift applied by the processor as a function of the determined rotational position of the platter.