How to control each channel's volume when audio's channel has more than 2 in Directshow?

In IBasicAudio people can only control volume and balance, this 2 function can not controll each channels volume if they are more than 2.

Is there any way to do that in directshow.

Solution

My problem is not a problem at all, forget about it, the volume sounds same no matter filter graph use 1 or more instances.