I have long been toying with the idea of buying a looper pedal. One function that I would need though is the ability to stop or call up loops at any time. Because salesmen have had a hard time understanding what I'm talking about, I will describe to you what I mean. Say I record a loop, and then a second. I want to stop the first loop, then record a third and fourth with the second still playing. Later, I want to stop the last three loops and call up the first to play over again. Are there any loopers that can do this without me having to re record the first loop? Your collective feedback is appreciated.