What interfaces do I need to call before I can use IBasicAudio to control volume?

[alwayz]

Hello everyone.

I tried using Audio Renderer's IBasicAudio methods to control the volume of a mic. The putVolume() return S_OK but the volume of the mic remains the same.

What interfaces and methods do I need to use in order to control the mic specifically?

Would appreciate any help. Thank you.
Nic