FCP Audio Problem-weird delay

	FCP Audio Problem-weird delay by Matt Campbell on Jun 26, 2009 at 1:55:45 pm My scratch track stereo audio is V1 and V2, my sound effects take up V3 and V4as well as V5 and V6. My system is plenty fast enough to playback uncompressed, or even ProRes 720p projects but my audio sometimes starts off echo'ing then about 1/2 way through it stops and the right channel is playing correctly but the left channel is delayed about 1 second and sounds like slow-mo. This is even after a render. But the next time the audio screw ups will be totally different. I have no filters or effects on my audio either. Specs: I have a broadcast 720p project in Motion that I exported as ProRes 720p 29.97 and dropped into FCP. There I have various still images overtop the video layer. I have one scratch audio track recorded through my Intensity Pro card and Mackie 1202 using the Capture now window with video off and only capturing audio. Note: Another of our people here have had similar issue in the past with multiple audio tracks and edits, essentially layering the audio over and over again. This created a delay and played back audio where there wasn't supposed to be any. Weird and very similar to my issue. We can't figure this one out. Has anyone come across this before or possibly have any solutions? OS 10.5.5, Mac Pro 2 x 3 ghz quad-core intel xenon, 9 gb ram, with BM Intensity Pro card Respond to this post   •   Return to posts index

	Re: FCP Audio Problem-weird delay by John Fishback on Jun 26, 2009 at 3:32:18 pm If you haven't, do an Audio Mixdown: Sequence > Render Only > Mixdown. John MacPro 8-core 2.8GHz 8 GB RAM OS 10.5.5 QT7.5.5 Kona 3 Dual Cinema 23 ATI Radeon HD 3870 ATTO ExpressSAS R380 RAID Adapter, PDE Enclosure with 8-drive 6TB RAID 5 24" TV-Logic Monitor Final Cut Studio 2 (up to date) Pro Tools HD w SYNC IO, Yamaha DM1000, Millennia Media HV-3C, Neumann U87, Schoeps Mk41 mics, Genelec Monitors, PrimaLT ISDN Respond to this post   •   Return to posts index

	Re: FCP Audio Problem-weird delay by Matt Campbell on Jun 26, 2009 at 4:10:36 pm Do you mean by Command Option R or actually exporting audio to AIF and re-importing into seqeunce, thus taking my 6 layers of audio down to 2? I've actually tried both methods and still the same issue. Echo is beginning is gone but 1/2 way through the audio is repeating itself. Again, audio is playing where there is no audio. Even when waveforms are showing nothing there, its playing. So weird. Also, odd note, when I re-created this sequence in SD using ProRes, and tested and re-recorded my scratch track using our HVX-200 camera and everything works just fine. Same audio sound effects and all. So I don't know if it was the audio recorded in FCP with Capture Now or not. All sample rates and frame rates match too. Playback is screwy. OS 10.5.5, Mac Pro 2 x 3 ghz quad-core intel xenon, 9 gb ram, with BM Intensity Pro card Respond to this post   •   Return to posts index

	Re: FCP Audio Problem-weird delay by John Fishback on Jun 26, 2009 at 4:19:00 pm I meant Command Option R. If you haven't, try trashing prefs and repairing permissions. What kind of drives are you using and how are they connected to your Mac? John MacPro 8-core 2.8GHz 8 GB RAM OS 10.5.5 QT7.5.5 Kona 3 Dual Cinema 23 ATI Radeon HD 3870 ATTO ExpressSAS R380 RAID Adapter, PDE Enclosure with 8-drive 6TB RAID 5 24" TV-Logic Monitor Final Cut Studio 2 (up to date) Pro Tools HD w SYNC IO, Yamaha DM1000, Millennia Media HV-3C, Neumann U87, Schoeps Mk41 mics, Genelec Monitors, PrimaLT ISDN Respond to this post   •   Return to posts index

	Re: FCP Audio Problem-weird delay by Matt Campbell on Jun 26, 2009 at 4:22:50 pm I have a Ciprico Media Vault 5 drive setup and configured as RAID 0. Connected via fiber channel. I've been digging around and found others having the same problem and with unanswered posts. Link to thread here: http://forums.creativecow.net/thread/8/1033007#1040500 http://forums.creativecow.net/thread/8/1041339#1041339 I'll try the prefs and permissions thing now. OS 10.5.5, Mac Pro 2 x 3 ghz quad-core intel xenon, 9 gb ram, with BM Intensity Pro card Respond to this post   •   Return to posts index

	Re: FCP Audio Problem-weird delay by Dave LaRonde on Jun 26, 2009 at 4:46:55 pm Like John says, a Mixdown is a very good thing. It's even helpful when exporting video: go figure. Another helpful thing is to use FCP's Render Manager to delete existing audio render files. It works better than simply dragging rendered audio files into the trash. Again, go figure. Dave LaRonde Sr. Promotion Producer KCRG-TV (ABC) Cedar Rapids, IA Respond to this post   •   Return to posts index