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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*1.66667 Hz
• freq_m2 = 622.528*1.66667 Hz
• freq_c1 = 1245.057*1.66667 Hz
• freq_c2 = 622.907*1.66667 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*1.66667 Hz
• freq_m2 = 740.120*1.66667 Hz
• freq_c1 = 1480.239*1.66667 Hz
• freq_c2 = 740.498*1.66667 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*1.66667 Hz
• freq_m2 = 933.035*1.66667 Hz
• freq_c1 = 1866.071*1.66667 Hz
• freq_c2 = 933.414*1.66667 Hz
Type
Wave (.wav)
Duration
0:08.000
File size
2.9 MB
Sample rate
48000.0 Hz
Bit depth
32 bit
Channels
Stereo