Loud buzz in FCP6

13 replies [Last post]
Ron Spicer
Offline
Joined: Jul 22 2001
Anyone know how to deal with this?   No positive answer from elsewhere.
 
After transferring a film from a VHS tape into FCP6, and halfway through the editing with all things normal I found that the audio had  suddenly diminished in strength, and I could hardly  hear it despite applying maximum strength to it via the FCP audio control.    I chose Modify and Audio then "Apply normalisation  . . . strength 5"  and found I'd got the buzz.  Turned it  back to original settings.    Audio still louder but still with the buzz.   Can anyone explain what I should do to obtain normal audio strength without this horrible buzz?
 
Addition:  
 
I've now found that the timeline audio is fixed and it is not possible to adjust it - a 'dead' red line that can't be moved and with the persistent loud buzz still there.
 
I'll come  completely out of FCP, restart then look in again.
 
Back in FCP6 after restart.   Audio more or less nil.   Sound in timeline adjustable but only one audio line at a time.   Strength not improved despite audio line being increased to maximum.   Chose Modify and Audio again to Normalisation and chose -12.   Sound level increased together with buzz and timeline adjustable with now both lines altering when moving just the one, (normal way), so at the moment I'm still stuck with this buzz but realise I can restart to get the original lack of sound without the buzz.
 
Myistified.  Anyone?
foxvideo
foxvideo's picture
Offline
Joined: Sep 9 1999
Re: Loud buzz in FCP6
What happens if you right click the file in the brower, select show in Finder and then open it in Quicktime 7

Dave Farrants Fox Video Editing

johnd
Offline
Joined: Mar 8 2009
Re: Loud buzz in FCP6
Hi Ron, 
excuse the daft question but I assume the audio on the VHS sounded ok when you transferred this in ?
 
Ron Spicer
Offline
Joined: Jul 22 2001
Re: Loud buzz in FCP6
Just come back in.   I'll try yours, Foxy.   Ta.
 
To  you John, yep.   Sound was okay until halfway through the edit.
 
Glad to get responses.   This film is a family one for someone and important to them!
Ron Spicer
Offline
Joined: Jul 22 2001
Re: Loud buzz in FCP6
foxvideo wrote:
What happens if you right click the file in the brower, select show in Finder and then open it in Quicktime 7
 
 
Film shows OK but no sound, Dave.
Ron Spicer
Offline
Joined: Jul 22 2001
Re: Loud buzz in FCP6
johnd wrote:
Hi Ron, 
excuse the daft question but I assume the audio on the VHS sounded ok when you transferred this in ?
 
 
 
Further to yours, John, the audio strength registered appropriately in the Panny SVHS with just the odd max level reached, coming out fine on the connected TV but of course not registering audio in FCP whilst in Log & Cap which is my usual.   And yes, the first part of the film had good audio and it was during my editing that the sudden audio loss took place.
 
johnd
Offline
Joined: Mar 8 2009
Re: Loud buzz in FCP6
does the transferred video file have it's sound intact throughout (ie will it play ok in something like mediaplayer or vlc player) before you brought it into FCP? 
Ron Spicer
Offline
Joined: Jul 22 2001
Re: Loud buzz in FCP6
johnd wrote:
does the transferred video file have it's sound intact throughout (ie will it play ok in something like mediaplayer or vlc player) before you brought it into FCP? 
 
I don't use Media Player, John.   It plays audio properly when viewing it straight from the recorder through to the TV but, as you can see in my answer to Dave, it doesn't show audio when using QT Player which, to me, is similar to using Media Player etc.
 
foxvideo
foxvideo's picture
Offline
Joined: Sep 9 1999
Re: Loud buzz in FCP6
Sounds like a system / speaker problem if the QT doesn't play with sound. Can you open an older project that you know has good sound? Can you play an audio CD in the computer? Can you play any QT files with audio?
 
Just a thought....are you using any sort of additional card - Blackmagic or AJA? - I've had problems with feedback loops if I forget to change the audio inputs / outputs.

Dave Farrants Fox Video Editing

Ron Spicer
Offline
Joined: Jul 22 2001
Re: Loud buzz in FCP6
I should've fed that info earlier, Dave.   I straightaway opened a previous film from the HD and it played without a hitch so the problem is somewhere within the FCP editing area.   I'm not using any extra cards and I've experimented with the audio settings in an effort to rid the problem without luck.    I've now also found that, when log and capturing a film, before I can play it I get the message:
 
"The audio sample rate of one or more of your captured media files does not match the sample rate on your source tape.   This may cause the video and audio to be out of sync.   Make sure the audio sample rate of your capture preset matches the sample rate of  your tape."
 
Edit here
By clicking the box with the message for self correcting I can of course rectify that, allowing the settings to match up and the film is in sync.   However, in regard to why that happens and how to prevent it is slightly out of my range at the moment!   Such a matter could be misleading in my present audio circumstances?
foxvideo
foxvideo's picture
Offline
Joined: Sep 9 1999
Re: Loud buzz in FCP6
How did you capture the VHS? Sounds like you captured at 32Khz instead of 48Khz although this shouldn't be too much of a problem - FCP will just render your 32k files to 48K or you can open a new sequence, drop a clip onto it and FCP will ask if you want to match the sequence settings to the clip - click yes, but I don't think that's your problem with the buzz - I've got no other suggestions at this point - sorry.

Dave Farrants Fox Video Editing

Ron Spicer
Offline
Joined: Jul 22 2001
Re: Loud buzz in FCP6
Thanks for your input anyway,   I did capture at 48khz but yes, FCP did ask the question for the new sequence setting.   I've tried Hum Remover but no good.  Something to remember is that the sudden loss of audio appeared to occur halfway through the edit.     The first part of the film is clear. 
foxvideo
foxvideo's picture
Offline
Joined: Sep 9 1999
Re: Loud buzz in FCP6
The captured file will be wherever you set your scratch disks in a folder called Capture - close FCP, find the original file that you captured and see if the audio in that file drops out half way through by opening it in QT player.

Dave Farrants Fox Video Editing

Ron Spicer
Offline
Joined: Jul 22 2001
Re: Loud buzz in FCP6
foxvideo wrote:
The captured file will be wherever you set your scratch disks in a folder called Capture - close FCP, find the original file that you captured and see if the audio in that file drops out half way through by opening it in QT player.
 
Solved, Foxy!    Took it into Sound Track Pro and applied Sound Reduction.   Audio now matches tape quality and buzz gone.
 
Thanks for joining with me.