I travel full time (most of the time) and don't have an amp. I use my macbook pro (mid 2015 model/ 2.2 GHz Intel Core i7/ 16 GB 1600 MHz DDR3) with Garageband and Guitar rig 5 for amp/effect emulation. As an interface I use an old M-Audio Mobile Pre (version one) which is probably 10 years old. So here is the problem: After playing for 20 minutes or more if I stop playing for a second I get a 2-3 second delay that won't go away until I unplug and plug back in the interface. Then I have to go through the settings in garageband and set my i/o to the mobile pre again. This usually only happens when I am also running youtube through google chrome to play along with backing tracks. Sometimes it's when I have no other programs running, the macbook has been recently restarted and its plugged in. Will a new interface fix this? Will a scarlett 2i2 be a good one to replace it with? I don't want to spend too much on it, but best audio quality and eliminating these latency problems would greatly reduce my frustration level. Thanks!