I'm trying to use a software called "Amplitube" as a guitar amplifier on a macbook air. However I'm really confused.
I used to have a mac with both a mic input and sound output jacks so I simply plunged in and everything worked fine except some settings of the modeler caused sound corruption maybe due to high processing demand.
So my question is do I need a so called "audio interface" in order to solve the sound corruption problem? Is "audio interface" another name for sound card?
And also the problem that my current macbook has only one input/output (They are consolidated), could it be solved by the audio interface?
After all how can I record my playing using a backing track and capture my playing using a camera?
Any help on any of these questions is highly appreciated.