in which amplitudes are read at a fixed rate, the read-out address varying stepwise by a given value, e.g. according to pitch

Full Title

Instruments in which the tones are synthesised from a data store, e.g. computer organs > in which amplitudes at successive sample points of a tone waveform are stored in one or more memories > in which amplitudes are read at a fixed rate, the read-out address varying stepwise by a given value, e.g. according to pitch