CMI8738-MX Datasheet, PDF (23/32 Pages) C-Media Electronics – PCI-6CH C3DX series /PCI-Based HRTF 3D Extension Positional Audio Chip

CMI8738
PCI-6CH C3DX series /PCI-Based HRTF 3D Extension Positional Audio Chip
Legacy SB compatible mixer
Index
0x00
0x04
D7
D6
D5
D4
D3
D2
D1
D0
Reserved
Wave volume left channel
Wave volume right channel
0x0A
Mic volume
0x22
Master volume left channel
Master volume right channel
0x26
FM volume left channel
FM volume right channel
0x28
Analog-CD volume left channel
Analog-CD volume right channel
0x2E
Line-In volume left channel
Line-In volume right channel
0x30
Master Volume L.
0x31
Master Volume R.
0x32
Wave volume L.
0x33
Wave volume R.
0x34
MIDI Volume L.
0x35
MIDI Volume R.
0x36
CD Volume L.
0x37
CD Volume R.
0x38
Line-In Volume L.
0x39
Line-In Volume R.
0x3A
Mic. Volume
0x3B
PC spk volume
0x3C
Output muting controls
Line L Line R
CD L
CD R
Mic
0x3D
Recording left channel controls
FM L
FM R
Line L Line R
CD L
CD R
Mic
0x3E
Recording right channel controls
FM L
FM R
Line L Line R
CD L
CD R
Mic
0x3F
Reserved
0x40
Reserved
0x41
Reserved
0x42
Reserved
0x43
Reserved
0x44
Reserved
0x45
Reserved
0x46
Reserved
0x47
Reserved
Please do not write any values into reserved registers
0x30-0x3A registers are SB16 compatible and will be linked with 0x04-0x21 SB Pro registers correspondingly.
Only 0x30-31 master volume registers are 5 bits and the other are 4 bits.
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Rev. 2.2 ︱ Page 23/24