If you have a guitar and haven't got the money for expensive music equipment then imagine a cable where at one end you have a 1/4” sound jack and a USB head at the other. This cable would do analogue to digital conversion inside the cable and come with drivers so it would be an independent sound device connected directly to your musical instrument of choice. Well that's what a LightSnake is.
I seen this yesterday and it sounds very cool. An even cheaper option however is to plug your guitar or musical instrument of choice directly into a sound card. All you need is a 1/4” to 3.5mm Converter Adaptor.