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Audio ‘anomalies’
This has been an issue that we’ve been ‘working around’ here for some time now – in both Versions 5 and 6 of FCP.
Often when sequences become ‘busy’ and are full of music and FX we start to have weird audio ‘anomolies’ such as the level suddenly rising for no reason and then coming back down 5 seconds later or levels not changing as / when requested etc.
Now weirdly these issues come up when playing the sequence normally – but if you park the playhead just before the ‘anaomolie’ and play – hey presto, it’s fine.
If you try playing the sequence out to tape the issue is still there – and also if you export a quicktime or AIFF via quicktime conversion the issue persists.
The only way that we’ve been able to cure this is by exporting the audio as an AIFF via compressor and then bringing that back in as a ‘mixdown’.
I have looked around to see if this is an issue that has already been discussed, but couldn’t find anything (apologies if it has).
Has anybody experienced this – and what was the issue – any input would be gratefully appreciated.
Regards,
Mark
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4 Replies
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just curious, how many tracks of real time audio do you have set in your prefs?
Keith Koby
Head of Post-Production Engineering
iNDEMAND NETWORKS
Howard TV!/MOJO/Movies On Demand/iNDEMAND Pay-Per-View -
Keith,
We’ve just got the default 8 tracks of real time audio set…………..
How might that influence the issue????
Regards,
Mark
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Not sure why the issue would persist in a quicktime conversion export. If you reduce the number of realtime audio tracks you will force a rendered mixdown similar to the compressor export.
The other thing that will cause anomalies in my experience is placing audio files in the timeline that are not aif 48khz. mp3s and especially 44.1k material tend to cause issues.
try reducing realtime audio playback and convert anything not aif 16bit 48k to that setting and try again.
Keith Koby
Head of Post-Production Engineering
iNDEMAND NETWORKS
Howard TV!/MOJO/Movies On Demand/iNDEMAND Pay-Per-View -
Try doing an Audio Mixdown of your sequence before sending it out. The number of tracks isn’t the only issue affecting playback. Any filters added to a track will reduce your ability to playback in realtime. Also make sure that all of your audio sources are samples at 48k. It can cause all kinds of problems if you are mixing sample rates.
Baring any hardware problems or software weirdness, I’m betting that this should solve most of your playback issues.
Tom
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