Dây 5e

Sound create use FM synthesis use C program. Use expf( -time ) envelop.

Algorithm 4 of YM2515 chip (not use chip, only follow its algorithm in C program)
• feed back = 0.0625
• use 3 oscillator group (same ampl, different freq):

GROUP 1
• ampl_m1 = 0.660*4.0
• ampl_m2 = 0.716*4.0
• ampl_c1 = 0.573*4.0
• ampl_c2 = 0.627*4.0

• freq_m1 = 1869.477 Hz
• freq_m2 = 622.528 Hz
• freq_c1 = 1245.057 Hz
• freq_c2 = 622.907 Hz

GROUP 2
• ampl_m1 = 0.660*4.0
• ampl_m2 = 0.716*4.0
• ampl_c1 = 0.573*4.0
• ampl_c2 = 0.627*4.0

• freq_m1 = 2222.630 Hz
• freq_m2 = 740.120 Hz
• freq_c1 = 1480.239 Hz
• freq_c2 = 740.498 Hz

GROUP 3
• ampl_m1 = 0.660*4.0
• ampl_m2 = 0.716*4.0
• ampl_c1 = 0.573*4.0
• ampl_c2 = 0.627*4.0

• freq_m1 = 2801.377 Hz
• freq_m2 = 933.035 Hz
• freq_c1 = 1866.071 Hz
• freq_c2 = 933.414 Hz