A music apparatus is constructed for processing a music tone signal in
response to a clock signal at each sampling period. In the music
apparatus, a clock generator generates the clock signal. A signal
processor is operable in synchronization to the clock signal for
time-divisionally processing a plurality of music tone signals through a
plurality of channels within one sampling period. A clock controller is
operative during a supply duration allocated within one sampling period
for supplying the clock signal to the signal processor from the clock
generator to thereby operate the signal processor, and is operative
during other than the supply duration within one sampling period for
stopping the supplying of the clock signal to the signal processor to
thereby suspend the signal processor.