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Dual Mic Audio Recording issue in Final Cut Pro
Camera:
Panaonic AG-DVX100
Sennheiser K6/M66 Boom Mic running to XLR input 1
Sonotrim/tram lavaliere running into XLR input 2
Input 1 and 2 both set to “ON” for Mic Power +48V
CH1 Select set to Input 1
CH2 Select set to Input 2Computer:
PowerBook G4
Mac OS X Version 10.5.1
2 GB DDR SDRAM
1.5 GHZ PowerPC G4
Shot on Scene File F5 at 24PSoftware:
Final Cut Pro 5.1.4
Capture Settings: Capture/Input DV NTSC 48 kHZ
Clip Settings (Audio) Input Channels 2, Stereo left unchecked (button/box with two circles left unconnected)I shot an interview on my DVX 100. The interviewers were recorded off camera with the Boom Mic that ran to Input 1 and the subject was recorded with the Lav that ran to Input 2.
While working with the footage on the timeline. The interviewers audio was on track A1 and the subject on track A2. Whenever the interviewer spoke I erased the subjects track from A2 and copied audio from A1 onto the track (please let me know if this was wrong) and vice versa when the Subject was speaking.
I made sure that the audio on track 1 was panned to -1 and that the audio on track 2 was panned to 1.
I then exported the file as a Quicktime movie (with make self contained box left unchecked) and imported it into iDVD. Up until this point the audio sounded normal on my FCP timeline and in my iDVD preview.
When the DVD was finished burning and I played it on a few different dvd/tv setups, it sounded fine, until I played it on a friends home entertainment center. At this point I heard slight audio phasing (a split second repeat on on of his rear channel speakers).
I wasn’t sure why this was happening so I went back into FCP, deleted everying on A2, and panned all the sound files on A1 to 0 to make it mono, yet the problem persisted.
Can someone tell me what I am doing wrong? Is there a possibility that his home entertainment center isn’t set up well.
Finally, for the future, what is the best way for me to handle audio recorded on separate channels like I did above.
Thank you.
replied 17 years, 4 months ago 2 Members · 3 Replies
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3 Replies
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I suspect your friend’s system was set up for some flavor of surround sound and was incorrectly interpreting your sound track.
As for the way you cut your audio my only suggestion would be to pan all the clips to center (0) so you have mono sound (unless you want each person’s voice to come from a different side). You can set the audio to mono in your first clip and then paste its attributes to all the other clips.
Also, listen carefully to the background sound. You may have to adjust the gain from interviewer to interviewee so you don’t get noticeable changes in “room tone.”
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
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John,
Thanks so much for the fast reply. Out of curiosity, if I make a copy the Subject’s channel (Input 2), and paste it to Track A1 and A2 in FCP for the parts where he is speaking, in favor of having the Subject on A1 and a silent Interviewer track playing on A2, will that cause any kinds of problems? Is it better to just leave the Audio on one channel if it was recorded the way I did it?
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That won’t cause any issues I know of. In fact, if the audio gain is low, that process will make it louder.
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
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