YMF795 Datasheet, PDF (14/45 Pages) YAMAHA CORPORATION – APL-2 Automobile sound Player-2

YMF795
□Timbre data register
$10 – 2Fh Timbre data
Eight timbre data can be registered into the register and four data out of them can be simultaneously reprodu
ced.
Timbre is made by setting both [parameters for the modulator] and [parameters for the carrier].
(For details of the modulator and the carrier, please refer to “General description of FM sound generator” (page 41)).
Index 10h, 11h …… 1st timbre_ timbre data for the modulator
Index 12h, 13h …… 1st timbre_ timbre data for the carrier
Index 14h, 15h …… 2nd timbre_ timbre data for the modulator
Index 16h, 17h …… 2nd timbre_ timbre data for the carrier
……………Omitted…………….
Index 2Ch, 2Dh …… 8th timbre_ timbre data for the modulator
Index 2Eh, 2Fh …… 8th timbre_ timbre data for the carrier
The following bit assignment is used for both modulator and carrier.
The setting must be completed before any sound is generated. Change of the timbre parameter during sound generation is
prohibited.
Timbre data Default: 0000h
Index B15 b14 b13 b12 B11 b10 B9 b8 b7 b6
EVEN ML2 ML1 ML0 VIB EGT SUS RR3 RR2 RR1 RR0
b5 b4 b3 b2
DR3 DR2 DR1 DR0
b1 b0
AR3 AR2
ODD AR1 AR0 SL3 SL2 SL1 SL0 TL5 TL4 TL3 TL2 TL1 TL0 WAV FL2 FL1 FL0
ML2 - ML0 : Multiple setting
“Multiple” is the multiplying factor for sound generating frequency. The output frequency is determined by the octave,
pitch, and multiple settings on the carrier side. Adjusting the Multiple on the Modulator side allows various timbre
creation.
ML [2:0]
0h
1h
2h
3h
4h
5h
6h
7h
Multiplying factor
for frequency
X 1/2
X1
X2
X3
X4
X5
X6
X7
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