ymf740c ETC-unknow, ymf740c Datasheet - Page 30

• Manufacturer Part Number: ymf740c
• Description: Ds-1l
• Manufacturer: ETC-unknow

YMF740C
(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.
(1) Volume for MIDI
The default is Master = 4, MIDI = 4 (-12dB).
(2) Volume for Voice
The default is Master = 4, Voice = 4 (-16dB).
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0000h
0000h
0000h
0000h
0000h
0000h
0000h
0000h
0000h
0000h
0000h
0000h
0000h
0000h
0000h
0000h
mute
mute
mute
mute
mute
mute
mute
mute
mute
mute
mute
mute
mute
mute
mute
mute
0
0
-52dB
-42dB
-36dB
-32dB
-30dB
-28dB
-26dB
-56dB
-46dB
-40dB
-36dB
-34dB
-32dB
-30dB
019Bh
028Ch
00A3h
019Bh
0000h
0029h
0082h
0103h
0206h
0335h
0000h
0019h
0052h
0103h
0146h
0206h
mute
mute
1
1
-42dB
-32dB
-26dB
-22dB
-20dB
-18dB
-16dB
-46dB
-36dB
-30dB
-26dB
-24dB
-22dB
-20dB
019Bh
080Eh
0A24h
0000h
0082h
0335h
0515h
0666h
0000h
0052h
0103h
0206h
0335h
0409h
0515h
0666h
mute
mute
2
2
-30-
Voice Vol. (04h)
-36dB
-26dB
-20dB
-16dB
-14dB
0CC5h
-12dB
-10dB
-40dB
-30dB
-24dB
-20dB
-18dB
-16dB
-14dB
0CC5h
MIDI Vol. (26h)
0A24h
143Dh
00A3h
080Eh
0A24h
0000h
0103h
0335h
0666h
1013h
0000h
0206h
0409h
0666h
mute
mute
3
3
-32dB
-22dB
-16dB
-12dB
-10dB
-36dB
-26dB
-20dB
-16dB
-14dB
0CC5h
-12dB
-10dB
143Dh
197Ah
143Dh
0000h
019Bh
0515h
0A24h
1013h
2013h
0000h
0103h
0335h
0666h
0A24h
1013h
mute
mute
-8dB
-6dB
4
4
-30dB
-20dB
-14dB
0CC5h
-10dB
-34dB
-24dB
-18dB
-14dB
0CC5h
-12dB
-10dB
143Dh
143Dh
0000h
0206h
0666h
197Ah
2013h
2861h
0000h
0146h
0409h
080Eh
1013h
187Ah
mute
-8dB
-6dB
-4dB
mute
-8dB
5
5
-28dB
-18dB
-12dB
-32dB
-22dB
-16dB
-12dB
-10dB
028Ch
080Eh
197Ah
32D6h
019Bh
0A24h
143Dh
197Ah
0000h
1013h
2013h
2861h
0000h
0515h
1013h
2013h
mute
mute
-8dB
-6dB
-4dB
-2dB
-8dB
-6dB
6
6
January 14, 1999
0666Eh
-26dB
-16dB
-10dB
-30dB
-20dB
-14dB
0CC5h
-10dB
143Dh
32D6h
3FFFh
143Dh
0000h
0335h
0A24h
2013h
2861h
0000h
0206h
197Ah
2013h
2861h
mute
mute
-6dB
-4dB
-2dB
-8dB
-6dB
-4dB
0dB
7
7