Hello and thanks for your help in advance.

I am trying to create a recording output for an external recorder using the right or left channel of a sound card. I have a SIP application that uses a USB sound card. The sound card transmits the caller audio to the operator ear and the operator mouth to the callers ear. All fine here.

What I need is to map the caller and operator mouth streams to the right output channel of the sound card for external recording. Can I do this with a known peice of software without using an external mixer?