Patent ID: 6687674
Filing Date: 2004-02-03
Classification: G10H,G10L

Abstract:
A waveform forming device comprising:a storage section that stores waveform data of a plurality of loop waveforms to be read out repeatedly and also stores phase management information in corresponding relation to the loop waveform, said plurality of loop waveforms including at least two loop waveform having different phase values corresponding to their respective initial addresses, and said phase management information being information that, when a corresponding one of the loop waveforms is reproduced from said storage section and combined with another reproduced loop waveform, is used for adjusting phases of the corresponding loop waveform and the other reproduced loop to match with each other; and a waveform forming section that forms a waveform of at least part of a sound, by selecting the two loop waveforms stored in said storage section, and by repeatedly reading out the waveform data of the selected loop waveforms to thereby form at least two of reproduced loop waveforms corresponding to the selected loop waveforms and combining together the reproduced loop waveforms, wherein said waveform forming section, while reading out a first loop waveform of the at least two of the loop waveforms, reads out a second loop waveform of the at least two of the loop waveforms and thereby combines said second loop waveform with said first loop waveform, said first loop waveform being read out ahead of said second loop waveform, and wherein said waveform forming section performs phase adjustment between the reproduced loop waveforms to be combined together by using the phase management information corresponding to the selected loop waveforms to determine a readout address of said second loop waveform in such a manner that a phase of said second loop waveform matches with a current phase of said first loop waveform corresponding to readout addresses of said first loop waveform.