Hi, I have developed AC97 Sound card driver for 2-Channels in Window NT. Now I want to add 6-Channel support. I have taken NTDDK SndSys,SndLib,DrvLib as a Base code. For adding 6-Channel support in Mixer , 1> i assume that i need to add some more enums in MixerLineIds and Ids for our controls such as ControlLineoutMasterVolume. e.g. to add rear channel : LOCALMIX.H enum{ DestLineout = 0, // Line 0 ... DestSurrout, //added for 6 channel support - IS IT OK? }MixerLineIds; and enum{ ControlLineoutMasterVolume = 0, // 0 ControlLineoutMasterMute, // 1 ... ControlSurroundVolume , //added for 6 channel support - IS IT OK? ControlSurroundMute, //added for 6 channel support - IS IT OK? }; 2> Do I need to add any members for MixerLineInit[MAXLINES] (of MIXER_DD_LINE_CONFIGURATION_DATA structure mix_objs.c) for 6 channel support? 3> What other changes are required? Any suggestions or help is welcome. Thanks in advance. if anybody can send psuedocode for same it would be great help. Regards, Tejendra Joshi ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.de/