由给定的谐波分量相对强度生成音符，用于乐器模拟、MIDI制作等- HARMONIC　Generates a note with its harmonic wave

　　HT=harmonic(soundname,tone,k,type) Generate a note with its harmonic

　　wave in given tone, simulating particular type of musical instrument

　　type=[basic,second,third,fourth,fifth] represents the coefficients of

　　harmonic wave.

　　This function is able to simulate several musical instrument varying

　　the relative amplitude of each harmonic wave.

　　Example : Re=harmonic(2, C ,4,[1,0.1,0.3,0.05,0.004])　generates a quarter

　　　　　　　note　re　in C , and simulating a particular instrument