| 摘要 |
Each of a plurality of channels includes a sample counter adapted to perform counting operation at a given rate. Independently for each channel, a control section (CT) sets the rate and an initial value for the counter of the channel and controls start and stop of the counting operation of the counter, so that a partial portion of an original waveform corresponding to a count range from the set initial value to a count stop point is reproduced in the channel. The control section sets the initial values in individual ones of a set of channels, selected from among the channels, such that sample values at different sample positions of the original waveform are simultaneously retrieved in individual ones of the set of channels, and controls an overlap adder (OLA) to add up the retrieved sample values, so that sample values of an audio waveform signal with a plurality of partial portions of the original waveform, which are to be reproduced in the set of channels, partially overlapping each other are output from the adder. By the overlapping between the plurality of partial portions of the original waveform, a reproduction time length and/or tone pitch can be readily controlled, and formant control can be performed in accordance with the given rate. |
