Nice setup.  You already have a computer, now you need an Ubuntu Studio live cd.  Included is jack-audio daemon and jack-timemachine.   Jack timemachine will run in the background and when you hit a hot key, "pre-record" the last minute(you can tell it how much) of audio that it "heard."  This is great for bending, when you never know when you might find a REALLy sweet noise.