Accompaniment data generating apparatus

A computer-readable medium storing a computer program applicable to an accompaniment data generating apparatus including a storing portion for storing sets of phrase waveform data each related to a chord identified on the basis of a combination of chord type and chord root, the computer program comprising the steps of:

• a chord information obtaining step of obtaining chord information which identifies chord type and chord root;
• and
• a chord note phrase generating step of generating waveform data indicative of a chord note phrase corresponding to a chord identified on the basis of the obtained chord information as accompaniment data by use of the phrase waveform data stored in the storing portion;
• wherein the each set of phrase waveform data related to a chord is formed of:
• a set of basic phrase waveform data which is applicable to a plurality of chord types and includes phrase waveform data indicative of at least a chord root note;
• and
• a plurality of selective phrase waveform data sets which are phrase waveform data indicative of a plurality of chord notes whose chord root is the chord root indicated by the set of basic phrase waveform data and each of which is applicable to a different chord type and which are not included in the set of basic phrase waveform data;
• and
• the chord note phrase generating step reads out the basic phrase waveform data and the selective phrase waveform data from the storing portion, combines the read data, and generates waveform data indicative of a chord note phrase.