First of all, is this possible? Next, can this be done taking the output from a program i.e. skype and the input from a headset (audio line in)? Also, what software/hardware will I need and how much will it cost? Finally, how is it done? I need medium to high quality audio and am currently using a 2.4Ghz Intel Core 2 Duo with 4gb 1067mhz ram and running Mountain Lion. First of all i tried using soundflower bed (have used it before for single track recording) and capturing with audacity. But the multi tracking has been confusing me. So i tried aggregate devices and multi output devices but what seemed to be a logical progression to me seemed not to work at all... I would value any constructive input.