Imovie HD 6--extremely choppy audio

I recently purchased a MacBook Pro.
When I capture video using imovie hd 6, the audio is EXTREMELY choppy. I take the same camera, same tape, and go to my old powerbook g4 and the audio is fine (using imovie HD 6 on that machine, too).
Even after capture, when I play the clip, the audio is choppy. I've burned a test to DVD, and the audio is choppy on the DVD. I don't think it's a memory issue as the MacBook Pro has more memory and a bigger harddrive. Perhaps I have some obscure setting set somewhere, but I can't figure it out. As far as I can tell, the two machines are set the same. Can anyone help me?
On the macbook pro, other sounds are fine (ie--music in itunes) so it's not a speaker issue. Any ideas?

Welcome to iMovie Discussions.
Sounds like (whoops!) your MacBook's busy doing other things when it's handling the audio, hence the 'choppiness'.
First, if it's brand new, click on the 'Spotlight' magnifying glass at top-right, and if it says "wait, I'm busy indexing" then do wait until it's stopped its initial indexing before you do anything else ..otherwise storage and retrieval on your hard disc will be slow and 'choppy' as it divides its attention between what you want doing, and the indexing which it wants to do for itself.
Second, go to System Preferences, and 'Security', and check that 'Filevault security is turned off', otherwise it'll be trying to encrypt and decrypt the audio ..which will make it stutter (..and will make the video stutter, too).
Thirdly, if you've got GarageBand installed, go there, and play a few notes; that should reset the general system audio to the correct playback rate. Or go to Applications>Utilities>Audio MIDI Setup, and change the Audio Input and Audio Output Format settings to anything, and then back to 44100.0Hz and 2ch-16bit, and then Save and Quit.
(If your MacBook's set up for an inappropriate audio rate (miniDV movies are recorded at 12 or - preferably - 16-bit, 48kHz) then the audio will be choppy while the Mac tries to convert it to an incorrect setting.)
Karl's identified other choppiness causes as excessive separate audio clips in the Timeline, but this wouldn't seem to apply in your case.
Others may have more ideas, but try those above and see if they help..

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spacedebris wrote:
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(emphasis added)
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WRONG!! SNR is signal to noise ratio and not the signal strength - usually specified in dBm not dB. Even an attenuated signal can have an SNR of 36 dB.
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Message Edited by Keyboards on 05-08-2009 06:52 PM
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darnyill-za wrote:
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delete and pair again
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When asking for help, post your question in the forum. Remember to include your system type, model number and OS. Do not post your serial number.
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