MEGA SYNTHESIS and YM2612 parameters conversion table
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		Parameters	YM2612 value	MEGA SYNTHESIS value
		OPERATOR LEVEL		0
			Enter any value from 0 to 127
		FEEDBACK	0	0
			1	18
			2	36
			3	54
			4	73
			5	91
			6	109
			7	126
		SUSTAIN LEVEL	0	127
			1	119
			2	111
			3	102
			4	94
			5	85
			6	77
			7	68
			8	60
			9	51
			10	43
			11	34
			12	26
			13	17
			14	9
			15	0
		RELEASE RATE	0	0
			1	2
			2	4
			3	6
			4	8
			5	10
			6	12
			7	14
			8	16
			9	18
			10	20
			11	22
			12	24
			13	26
			14	28
			15	31
		DETUNE	0	0
			1	1
			2	2
			3	3
			4	0
			5	-1
			6	-2
			7	-3
		SSG	0
			1
			2
			3
			4
			5
			6
			7