1. Opti82c931.zip Driver
2. MIXER.TXT File Contents

MIXER.TXT Driver File Contents (Opti82c931.zip)

MIXER.EXE is the general purpose Codec setting control program.
For the time being, it will get the information from MIXER.CFG,
and VOLUME.CFG. Please copy MIXER.EXE, MIXER.CFG and VOLUME.CFG
to the installation directory of user selection. In the batch run
mode,"MIXER /B", it will read the information from MIXER.CFG, 
VOLUME.CFG and SOUND16.CFG only. That means there is no modification
to these files.

Also, it is not necessary to keep volume page of SNDINIT.EXE and 
add the following line to [OPTION] of SOUN16.CFG.
	VOLUMEPAGE=NO

For Channel Mapping Customization case:
It is OEM manufacture's responsibility to specify the channel usage
according to her/his design. For "MAPPING" section of MIXER.CFG,
there are several setting objects. 

1) Title is the custom title shown in the MIXER.EXE.

2) Default_Codec_Mapping to determine whether to use Codec as OPTi 
   reference design. If "Yes", then the following object will not be
   used.

3) Max. 5 volume control objects and these are "AUX1_Control_Name",
   "AUX2_Control_Name", "DAC_Control_Name", "LINE_Control_Name" and
   "MIC_Control_Name". The choices are "CD", "MIDI", "WAVE", "LINE"
   and "MIC".

4) Use "Use_Karaoke_By_DME" to turn on or off Karaoke function.

5) Use "Total_Extra_Controls" to determine how many extra controls 
   will be in MIXER.EXE.

6) Use "Extra_Control_x_Name" to show control's name.

7) Use "Extra_Control_x_By" to determine which bit will be set. The 
   choices are "XCTL0", "XCTL1", "GPOUT", "GPIO0", "GPIO1", "GPIO2"
   and "GPIO3".
   Use "Extra_Control_x_On_Val" to determine whether "1" or "0"means
   enabled.

8) The last one is "Input_x_Control_Name", where x means which input
   for recording and it starts from "0" to max. "3". The choices are
   "MIC", "MIX", "CD" and "LINE".


NOTE:

   930 and 1848 does not have Karaoke control object even user select
   "Yes" in MIXER.CFG.
   Only 1845 and 4231 have Mono control Object.
   GPOUT is only for 929.
   Item 7 and 8 are recommended to be modified by the manufacture.  


The example is shown as follows:

[MAPPING]
Title=Mixer Application of OPTi Inc. v1.01
Default_Codec_Mapping=No
AUX1_Control_Name=CD
AUX2_Control_Name=MIDI
DAC_Control_Name=WAVE

Use_Karaoke_By_DME=Yes

Total_Extra_Controls=1
Extra_Control_1_Name=3D
Extra_Control_1_By=XCTL0
Extra_Control_1_On_Val=1

Input_0_Control_Name=LINE
Input_1_Control_Name=AUX
Input_2_Control_Name=MIC
Input_3_Control_Name=MIX



For Volume Adjustment case:
It is specified in VOLUME.CFG and see the following example.

[SETTINGS]
XCTL0=0,0        ;these are used if Extra_Control are defined in mixer.cfg
XCTL1=0,0
GPOUT=0,0        ;for 929 only

DME=0,1          ;if Use_Karaoke_By_DME=Yes in mixer.cfg 
                 ;also it dose not use 930 or 1845

MONOGAIN=50,40   ;if MONO_INPUT=ON in sound16.cfg and it use 1845 or 4231

MICLEFT=50,40    ;if Codec is 1845 but it is in sound16.cfg for 930
MICRIGHT=50,40   ;if Codec is 1845 but it is in sound16.cfg for 930

LINELEFT=70,70   ;if LINE feature is used and it it in sound16.cfg
LINERIGHT=70,70  ;for 930