Audio mixing?

I'm using a Mac, and I would prefer to have control over all my audio output on my side, can anyone suggest any cheap/free application that will allow me to choose multiple input sources to send via my VoIP session? I'd have though this would be fairly easy, but it's not as obvious as I'd have liked. Ideally I want to send a mixed input of my microphone and one or more other applications (selectable on-the-fly) to the VoIP session, whilst keeping my output to my headphones as fairly standard (so my receiving VoIP, applications, etc, but not my own microphone). I have Soundflower but although it enables me to select itself as an input or output, it doesn't seem to allow multiple inputs. -- Pete.

Try ManyCam Pro (Mac version), or try CamTwist and see if that does it. Unfortunately CamTwist website does not tout the feature, but I think this type of program does it. ManyCam touts the feature but says you need the paid "Pro" version to access the multiple-audio-track mixing feature. <a href="http://www.manycam.com/buy/pro" rel="nofollow">http://www.manycam.com/buy/pro</a> <a href="http://camtwiststudio.com/" rel="nofollow">http://camtwiststudio.com/</a>

Thanks - I'm using audio-only though, and these cam products are a little overkill. I guess maybe I need some sort of DJ software, but I was hoping to find something lightweight and basic that just allows me to manipulate multiple audio sources in a flexible input/output array. -- Pete.