YMF740C Datasheet, PDF (30/44 Pages) List of Unclassifed Manufacturers – DS-1L

YMF740C
(1) Volume for MIDI
0
1
2
mute
mute
mute
0
0000h
0000h
0000h
mute -52dB -42dB
1
0000h
0029h
0082h
mute -42dB -32dB
2
0000h
0082h
019Bh
mute -36dB -26dB
3
0000h
0103h
0335h
mute -32dB -22dB
4
0000h
019Bh
0515h
mute -30dB -20dB
5
0000h
0206h
0666h
mute -28dB -18dB
6
0000h
028Ch
080Eh
mute -26dB -16dB
7
0000h
0335h
0A24h
The default is Master = 4, MIDI = 4 (-12dB).
MIDI Vol. (26h)
3
4
mute
mute
0000h
0000h
-36dB -32dB
0103h
019Bh
-26dB -22dB
0335h
0515h
-20dB -16dB
0666h
0A24h
-16dB -12dB
0A24h
1013h
-14dB -10dB
0CC5h
143Dh
-12dB -8dB
1013h
197Ah
-10dB -6dB
143Dh
2013h
5
mute
0000h
-30dB
0206h
-20dB
0666h
-14dB
0CC5h
-10dB
143Dh
-8dB
197Ah
-6dB
2013h
-4dB
2861h
6
mute
0000h
-28dB
028Ch
-18dB
080Eh
-12dB
1013h
-8dB
197Ah
-6dB
2013h
-4dB
2861h
-2dB
32D6h
7
mute
0000h
-26dB
0335h
-16dB
0A24h
-10dB
143Dh
-6dB
2013h
-4dB
2861h
-2dB
32D6h
0dB
3FFFh
(2) Volume for Voice
0
1
2
mute
mute
mute
0
0000h
0000h
0000h
mute -56dB -46dB
1
0000h
0019h
0052h
mute -46dB -36dB
2
0000h
0052h
0103h
mute -40dB -30dB
3
0000h
00A3h
0206h
mute -36dB -26dB
4
0000h
0103h
0335h
mute -34dB -24dB
5
0000h
0146h
0409h
mute -32dB -22dB
6
0000h
019Bh
0515h
mute -30dB -20dB
7
0000h
0206h
0666h
The default is Master = 4, Voice = 4 (-16dB).
Voice Vol. (04h)
3
4
mute
mute
0000h
0000h
-40dB -36dB
00A3h
0103h
-30dB -26dB
0206h
0335h
-24dB -20dB
0409h
0666h
-20dB -16dB
0666h
0A24h
-18dB -14dB
080Eh
0CC5h
-16dB -12dB
0A24h
1013h
-14dB -10dB
0CC5h
143Dh
5
mute
0000h
-34dB
0146h
-24dB
0409h
-18dB
080Eh
-14dB
0CC5h
-12dB
1013h
-10dB
143Dh
-8dB
187Ah
6
mute
0000h
-32dB
019Bh
-22dB
0515h
-16dB
0A24h
-12dB
1013h
-10dB
143Dh
-8dB
197Ah
-6dB
2013h
7
mute
0000h
-30dB
0206h
-20dB
0666Eh
-14dB
0CC5h
-10dB
143Dh
-8dB
197Ah
-6dB
2013h
-4dB
2861h
(2) SB Mixer ® AC’97
The volume of CD, Line and MIC are applied to this case. AC’97 volume are not updated automatically
when these values are changed. Thus, the SB Mixer values need to be written to the AC’97 register with
the software.
January 14, 1999
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