I bought a cheap Guitar to USB cable and it works fine for recording on OS X (using Ableton). But over a short period of time (5+ minutes) the latency seems starts to build up on the input and I really notice it between playing a note and hearing it.
I've tried playing around with the sample rate and buffer size (now set to 48k and 32 samples) but nothing seems to work for a long period of time and it's rather annoying.
On first firing up Ableton or changing the above settings there is no noticeable latency, also note the same thing happens in Guitar Rig/Peavey Revalver independent of Ableton.
Is there anything I can do or do I need to buy some better hardware?