Patent ID: 7099827

Claim:
A waveform producing method comprising the steps of: receiving a tone generation instruction that instructs generation of a tone; receiving style-of-rendition identification information indicative of a style of rendition to be added to the tone to be generated based on the tone generation instruction; reading out wave factor data from a style-of-rendition table based on the received style-of-rendition identification information, said wave factor data including at least vector identification information identifying vector data and time position data corresponding to a time position of the vector data; generating a packet stream in accordance with the wave factor data read out by said step of reading out, the packet stream including a series of packets, each of the packets including vector identification information that corresponds to the vector identification information in the wave factor data and time information indicative of timing that corresponds to the time position data in the wave factor data and depends on timing of the tone generation instruction; and reading out, from a storage device, vector data on the basis of the vector identification information included in individual ones of the packets and then sequentially producing a waveform in accordance with the time information included in the individual packets and on the basis of the read-out vector data.