Hi Everybody, I just bought a new MacBook Pro in December for me and my wife. She uses Pc-type computers at work, and I (incredibly) have never really owned a computer, just so any advice-givers here realize what a state I'm in. I am a complete idiot when it comes to computers. Anyway, on to the problem. I discovered the Garageband program after buying the computer, and was very pleased with it. I don't have a recording background either, but the thing I like about this Mac is it sort of teaches you how to do stuff as you go along. Anyway, I managed to record a couple of songs, and they turned out pretty well. Then, while recording a third song, using the same effects, I ran into "Latency". I noticed that Latency only occurs when I try to use the guitar effects while recording. When I record clean, or from the "pre-amp out" socket on my amp, everything is cool. So, I can still use Garageband, just not the effects, like "cool Jazz", etc. I have researched Latency, so I know it is discussed at length in other forums. I know that converting the signal from my guitar to digital, writing it on the hard drive, adding the effect, and piping it back up the earphones uses up all kinds of processing power. I realise that shutting down other applications will help the computer run faster. I understand that using a digital interface will reduce latency compared to just using the "line-in" port. I know that adding my effects from the amp or a pedal and just recording that sound with "no effects" will eliminate the latency. I know all about reducing latency in the garageband preferences menu. etc, etc, etc. However, I am confused because when my computer was BRAND new two months ago, I could simply plug my guitar into the "line-in" hole, add some light effects, and record a tune with no latency. Now I can't. Something has changed. This is not simply a case of, "oh yeah, you will get latency in Garageband, you need to live with it or circumvent it using this or that product" I already know this. I am living with it and I am circumventing it by using the pre-amp from my fender twin. I am worried that something inside my new computer is broken, or running slower because of something I've done. It seems to be behaving like a computer should for the most part, sometimes I get that little pinwheelie-thing and have to "force quit"(not in Garageband, actually) but I gather this happens to the best of us every once in a while. I have no idea how to diagnose any problems with it, and besides, I gather that many other peoples' computers are doing the exact same thing because of all the discussion I see posted on the internet. I guess my question is: if latency is normal, the why did I not have it all along? Why was the computer Latency-free until the fourth song I recorded? By the way, I installed "leopard" when I first got the computer, it's a macbook Pro, and I don't really know anything else about it. My life won't end if I don't solve this, Garageband still works well enough I suppose, I'm just very curious. Worked perfectly before, works less perfectly now, how come?