To summarize, at this point you need a large computer and an audio/midi interface. In case you have the computer, your total investment significantly is approximately $150. Possibly much not so. Next you need a Digital Audio Workstation. This could be the software equivalent about a mutl-track recorder and mixer. These is software such as Ableton Live, Pro Tools, Cubase, Sonar, Samplitude and others. Close . usually come in a couple of versions. The limited edition, and the whole enchilada…