Buzzing when editing audio

Hi,
I'm editing for a band (at 96k if it makes a difference?) And after so many edits (cutting each note at a time) the audio I'm working on starts buzzing on playback and when I make the cuts (so its buzzing when I'm previewing audio before cutting with the scissors if that makes sense?) The only cure I know is to quit LP7 trash the preference file and re open. But doing this 8-15 times an hour is really starting to get very annoying. Sometimes I can get 30 edits/cuts and then it starts to buzz, other times its within 2 or 3. It's as if I've caught Logic on a bad day sometimes and it just doesn't want to not buzz!
An interesting thing to note is that I can tell if its about to happen as the metronome click (Which I'm referencing to when I'm listening back to it) starts sounding like its doubling/phasing. Someone told me it might be the sample rate resetting back to 44.1, but both my 8pre and sample rate in the audio window are still set to 96k. Even the Sample Rate in the AudioMidiSetup is at 96k! So its not that
Is this some sort of issue as I also have LP8 installed?
Please note this is affecting me on both my MacPro 3Ghz (Early 2008) with MOTU 8pre and 17" MacBook Pro (Late 2008) just using the built in C.A.D.
Meanwhile I need to go and trash the preferences again! (Second time in the hour)
Cheers,
Ben

Hello Caramby,
These audio files don't have buzzing or clicks in them, if they did the producer on session would have probably changed engineer lol. I'm cutting several files at once grouped in Logic: the DI feed, and the mics around the amp - so in total around 7 mono audio files. The buzzing sounds like a clocking issue rather than artefacts in the track as when I quit LP7 and reopen the audio and play it all the way through its fine - and I would also see any artefacts in the audio as I'm cutting pretty much to the sample, and then moving it to get it in time.
As you read in my original post, I can start editing and it be fine for 30 bars or worse and its 2 bars. When it happens and I press the Control+Shift keys (to fine tune the cut) and get the scrubbing sound of the audio, I get this clocking buzz...
The session was done in at a commercial studio ProTools 8 but our studio works mainly in Logic 7.2.x (with TDM hardware) as we find it a little easier to use (until we can get our hands on a stable version of PT8) So the audio needs to stay in LP7...
Hope this helps!

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