12 bit audio

Hey, I've been given 5 hours of recorded video all with 12bit audio. When I bring it into iMovie it crackles and jumps horribly. I don't seem to be able to set the ausio import rate. Any ideas?
THanks.
M.
ps I can bring in in through Toast and then export as dv and then bring it into iMovie. All comes in as one clip. Tedious and long!
Help

Lennart, I have about 400 weddings shot on DV tape shot at 12 bit audio over the past 7 years or so. They are all on external hard drives as iMovie 2.1.2 projects. Most of them ( 90% are over 2 hours long ).That was fine when most had to be on VHS tape. No problem. Now most want a DVD with chapters. Big Problem. The iMovie 2.1.2 does not integrate with iDVD so I decided to try and make a full quality QT and import that into iMovie 6 and go from there. No luck, audio was out of synch. I opened the original iMovie 2.1.2 with iMovie 6 and could not read many transitions ( Gee Three ones and others). Now I was in really big trouble. I was looking at re-editing entire projects in iM6. Did one last week and it was 2 hours and 23 minutes long. Took me a whole day to edit. Brought it into iDVD and was told that the content was too long. I got a double layer burner and that is when the Big Wait began. I exported to disc image and took a full day to do that. IDVD hangs at the very end when it encodes audio. Been told to convert the mp3 audio songs to aiff. Did that and no improvement at encoding time. I was under the impression that it would take about 4 hours or less to encode my movie using a dual processor 2.7ghz tower with 8 gigs of ram. My question is how can I take most of those iM2 projects and make DVD's with chapters without re-editing them? I know I must use a later version of iM2 to add chapters but how can I do that without losing any transitions? I posted this question in the iDVD forums but since it also involves iMovie I thought I would give that a try. Thanks Lennart.

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12 bit audio

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