Hissing and cracking since updating

So I updated my 09 iMac to Mavericks about 2/3 days after it came out and then updated all my other apps, including garageband.
Ever since then every time I plug in an instrument to my recording interface it just hisses and cracks back at me, it's a similar sound you'd get from overloading the speakers. It only does it with GB and only on instruments going in and playback of recording of said instruments, regardless of volume or type of sound.
I've done a few things and read a few threads here too, but nothing has changed yet. I've used the old verison of GB, which is still about on my mac, and the problem is now present there too. My recording interface is a Roland UA-55, and it is fully upto date with drivers.
I have done all the usual things with GB, my Roland and my mac, re-installing, un-installing, driver updating, switching cables, sockets, instruments, swtiching frame rates and getting in a bad mood with it etc etc. It only seems to be an issue when I use my midi interface (the Roland UA-55), in-built mic is okay and havn't tested line out because someone nicked me cable.
But basically the day before I updated, everything worked fine, the next day after the update, it's now essentially unusable to me. Any thoughts? Thanks!

I have the same problem. I installed the newest driver from the roland website, version 1.5.2
Audio works fine for a few minutes, then starts cracking, more and more dropouts occur.
That happens no matter what buffer size or sampling rate I dial in. Everytime I change the settings in the ua-55 driver, the audio is fine for a few minutes, then the noise and dropouts start again.
This happens in every audio-app I have tried like I-Tunes, Spotify and even Youtube. In Garageband I get an error message about audio-midi sync problems.
Has anybody found a solution? Any reactions from apple or roland so far? I really would like to start making music on my brandnew imac!!
Thanks heaps!

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Quote from: Thor on 08-July-11, 05:33:50
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Hissing and cracking since updating

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