Electronic musical instrument.

摘要

An electronic musical instrument comprises a keyboard (11) for generating tone data or key codes each representative of a tone to be generated and a tone generating circuit (14) having a plurality of tone generating channels (#1 to #N). The electronic musical instrument also comprises a RAM (18) having a plurality of storing positions for storing the key codes each of which is assigned under the control of a central processing unit (CPU (17)) to a respective one of the tone generating channels to thereby generate a tone determined by the assigned key code. When a key is newly depressed on the keyboard - (11), each of the key codes stored in the RAM (18) is read therefrom and supplied to an envelope generator (19) which in turn generates data (EGL) representative of an amplitude of each of the envelopes given to the tones. The key codes read from the RAM (18) are also supplied to a ROM (22) to read therefrom weighting data. The CPU (17) modifies each of the envelope amplitude data (EGL) based on a respective one of the weighting data, and selects one of the key codes stored in the RAM (18) in accordance with the modified envelope data. Then, the CPU (17) replaces the selected key code in the RAM (18) by the key code generated in response to the new depression of the key.