Help - corrupted file? Horrible white noise/static

[tiguersound]

Hello-
Did a remote recording of a piano recital this evening. DP5.13, MOTU 828MKII firewire.
I headphone monitored the entire recital. Went off with out a hitch, or so I thought.
When I got home, I pulled it up to check it out.
The 1/2 before intermission is perfect.
The 2nd half started out great, but a minute or so into the 2nd half - some EXTREMELY loud white noise happens from there until the end of the file (45 minutes.) You cannot hear any music, just very, very loud noise.
The wave form visually looks perfect, as it did while I was recording it.
I played the audio files in the Finder and the noise is there too.
Is there any way to fix this?
What could have happened?
Thanks

[Frodo]

This is really bizarre. Someone else had this happen at their studio this morning in the middle of a recording session. A number of soundbites would partially flatline right after recording or would create very loud white noise from the middle of the take to the end of the file. It's like DP shuts down the input/record mode.

As far as I know, it's unpredictable and tends to go away as fast as it appears. I know it has nothing to do with firewire or esata busses. There have been other users who've mentioned having audio files disappear entirely, and the famous crash on save bug is still pops up once in a while. I don't know if all of these things are related or not, but numerous crash logs include some sort of Core Audio/MAS framework as being *part* of the problem.

It's not that this is a widespread problem, but it only needs to happen once to lose an irreplaceable take. MOTU can't reproduce the problem.

I thought it was just me-- but I'm afraid I don't have a solution to offer.

[tiguersound]

Thanks for the reply. I've been using DP for probably 10 years or more and never experienced this. Occasionally, with the newer versions, I'll get some random static here and there as others have indicated, but you can usually work around it with a reboot, or something. This is 45 minutes of a piano recital for this man's Masters. Of course, irreplaceable.
Wave forms look great, but give off just loud noise. So odd - I monitored the output the entire time. - My only saving grace was I did have a DAT recorder going just in case - and this should save the day... whew.
Needless to say, I have about zero confidence now with DP.

[EMRR]

Probably not helpful, but I've seen a similar problem with tracks that have been renamed manually and misplaced. In that case you get a solid 0dbfs 'log' visual rather than a waveform visual, and full scale noise on playback.

[kassonica]

How can the waveforms look great and there be noise.....

Have you tried importing them into another program?

BIZARE.

[martian]

maybe it made the wave over view on recording

I was having probs with one of my customers - they were renting the overnight recordin VO

they kept insisting that lines that they recorded had disappeared - the operator kept saying they had forfgot to record them.... ( and there was no discrepancy in the finder- take 10 was recorded after take 9 etc etc..)

stalemate! I hit on the idea of running an MP3 recorder ( actually it does wav's too ) at the start he hits record and it runs in back ground until they finish - and we let them know it;s doing that...

strangely enough the issue never cropped up again......

it's a slightly different problem to yours but maybe next time you can run 2 progs at the same time - we do it for weeks at a time - same input 2 diff apps - core audio rocks!!!

[tiguersound]

Haven't renamed them.
Tried, playing them from the finder, Quicktime, Soundtrack Pro and MPEG Streamclip all with the same results.
I don't understand how this could happen. The waveform is visually ok in DP, but in SoundTrack pro, it's a solid mess, full scale top to bottom so I doubt they're recoverable.

[martian]

dude that so sux... are these stereo or multitrack? I think it's more for next time than now...

to be honest I think you are very brave to attempt such thing with DP

[Spikey Horse]

Just off out so no time to read entire thread, but have a look at this from a few days ago ... I made pics and everything ...

http://www.motunation.com/forum/viewtopic.php?t=28354

Now try zooming into your bad soundbites and see if they are the same as mine - mine looked OK (which was confusing) until I zoomed in horizontally enough to make the the digital nonsense show up.

[kassonica]

I wonder if this is a problem within DP or the convertors.

OR BOTH.

[Electric Lotus]

Yup, I experienced the same thing. The waveform is looks fine, but you get to see the noise tacking full amplitude after a few seconds when zooming in very narrowly ????
So wierd, it displays fine only when not in full zoom...I take it the waveform overview is done pre-HD writing....but the ear scorching static attacks you out of nowhere...didn't happen in DP5, using DP6 as of now... Would love to find out, I'm now scared to record anything, because it gets physically painful, and recurring often enough to be a major problem...

[dave pine]

exact same thing happened to me once, but at the time, i was running low on hard drive space, less than a gig, when dp barfed.

[Castlebury]

I have had this issue crop up over the past 2 weeks. Same scenario. The waveforms look fine but the playback is total static. In an attempt to fix things I did all of the normal fixes trashing prefs etc. and then ended up rebuilding my bundles. I don't know if any of this fixed the issue though as it seems to be something that appears out of nowhere. I bailed on 6.01 and am finishing my current mix in 5.13 and have not had it come up again but it is very strange.

[Frodo]

I have had this issue crop up over the past 2 weeks. Same scenario. The waveforms look fine but the playback is total static. In an attempt to fix things I did all of the normal fixes trashing prefs etc. and then ended up rebuilding my bundles. I don't know if any of this fixed the issue though as it seems to be something that appears out of nowhere. I bailed on 6.01 and am finishing my current mix in 5.13 and have not had it come up again but it is very strange.

Wow-- this is almost exactly what happened to me over the weekend. What I did was that I "selected all" and dragged the entire project to the desktop to make a clipping, opened a new project and dragged the clipping into it. Seemed to work. This was in 6.01 in Leopard while editing some audio tracks. I think it was a bit rate quirk. My guess is that the audio didn't do its conversion properly on import, but the static remained when background processing showed no activity. Putting clipping in fresh template was a fairly quick solution.

But Iset up yet another template in 5.13 in Tiger before got going with VIs and other heavy lifting. The audio edited in 6.01 imported into 5.13 without incident.

[Castlebury]

Frodo,

Can you give just a bit more detail of what you did to correct the static issue. I just opened my last song to mix to find static on one of the trumpet tracks. Same MO in that the track looks fine in the wave display but this horrible static sound. Obviously those guys (trpts.) are long gone and I need to hopefully heal the file if at all possible as I need to finish the mix today due to deadlines.

BTW I have really appreciated your input to this board over the years. I'm not a heavy poster but I do read the board every day and have found your posts to be most helpful.

Good on ya!

Thanks,