Abstract: Waveform data are stored in advance together with reference position information indicative of reference positions, in the waveform data, corresponding to reference timing, such as beat timing, and correction position information indicative of correction positions in the waveform data that are different from the reference positions. The reference timing is advanced when the waveform data are reproduced. In response to arrival of the reference timing, a deviation between a reproduction position of the currently reproduced waveform data and the reference position is evaluated. When the reproduction position arrives at the correction position, the reproduction position is corrected according to the evaluated deviation.

Abstract: A plurality of sets of waveform data and switchover position information indicative of, for each of the sets of waveform data, one or more possible switchover positions in the waveform data are prestored, and one set of waveform data is reproduced in accordance with the passage of time. During reproduction of a first set of waveform data, a second set of waveform data is designated at given timing in response to a user's instruction. Control is performed such that the waveform data to be reproduced is switched from the first set of waveform data over to the second set of waveform data in response to waveform data reproduction timing arriving at one of the possible switchover positions indicated by the switchover position information corresponding to the second set of waveform data. Reproduction of the second set of waveform data is started at the switchover position corresponding to the reproduction timing.

Abstract: Waveform data are stored in advance together with reference position information indicative of reference positions, in the waveform data, corresponding to reference timing, such as beat timing, and correction position information indicative of correction positions in the waveform data that are different from the reference positions. The reference timing is advanced when the waveform data are reproduced. In response to arrival of the reference timing, a deviation between a reproduction position of the currently reproduced waveform data and the reference position is evaluated. When the reproduction position arrives at the correction position, the reproduction position is corrected according to the evaluated deviation.

Abstract: A plurality of sets of waveform data and switchover position information indicative of, for each of the sets of waveform data, one or more possible switchover positions in the waveform data are prestored, and one set of waveform data is reproduced in accordance with the passage of time. During reproduction of a first set of waveform data, a second set of waveform data is designated at given timing in response to a user's instruction. Control is performed such that the waveform data to be reproduced is switched from the first set of waveform data over to the second set of waveform data in response to waveform data reproduction timing arriving at one of the possible switchover positions indicated by the switchover position information corresponding to the second set of waveform data. Reproduction of the second set of waveform data is started at the switchover position corresponding to the reproduction timing.