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-   -   Drowning Out the Teacher (https://www.dvinfo.net/forum/all-things-audio/36858-drowning-out-teacher.html)

Dave Frank December 24th, 2004 05:48 PM

Drowning Out the Teacher
 
I have a scene I am finishing the audio on and I am trying to figure out the best way to achieve a certain audio effect. The scene is in a classroom and two students are having a conversation in the back of the class as the teacher is still talking. What should I do to the audio track of the teacher speaking to make sure it doesn't compete with the students talking? I'm guessing maybe something like a low-pass filter might help it sound drowned out. But I am not sure. Any ideas?

Douglas Spotted Eagle December 24th, 2004 05:52 PM

Do you have the tracks of the students recorded separate from the teacher?
If so, it's an easy matter to dull down the EQ of the teacher's voice, leaving the student voices articulate.
If not, it's gonna be a challenge, if all 3 voices are on 2 or 1 track.

Dennis Liu December 24th, 2004 06:54 PM

Why not just have it so that the teacher is out of focus or out of frame (so that you can't see his/her mouth), then record her dialogue in the same room later, put it on as another track in your editing program. Then you can do whatever you want.

Dennis

Dave Frank December 29th, 2004 01:07 AM

I recorded them separately. It would be insanity to do otherwise. I guess I will just EQ it.

Jay Massengill December 29th, 2004 09:51 AM

Yes, I would experiment with EQ first.
A wide dip between 2khz and 2.5khz will substantially dull the teacher's voice. Roll-off the highs considerably. Using a low-pass may be too dramatic but you should experiment to find out if it's workable. A lot will depend on the range of settings available in your particular filters.
Set your volume appropriately after EQ to achieve the balance between tracks and it should be achievable.
You can also try reverb on the teacher but use a much higher percentage of the wet signal and very little of the direct sound. This will make it sound muffled and distant. If you take it to the extreme, it will sound like the teacher is outside the room.
Use moderation, if you've shot the visuals effectively it won't take much to convey the idea without the audio effect becoming too obvious.

Ty Ford January 1st, 2005 07:25 AM

Re: Drowning Out the Teacher
 
<<<-- Originally posted by Dave Frank : I have a scene I am finishing the audio on and I am trying to figure out the best way to achieve a certain audio effect. The scene is in a classroom and two students are having a conversation in the back of the class as the teacher is still talking. What should I do to the audio track of the teacher speaking to make sure it doesn't compete with the students talking? I'm guessing maybe something like a low-pass filter might help it sound drowned out. But I am not sure. Any ideas? -->>>



Only mic the students.

Smiles,

Ty Ford

Ian Corey January 1st, 2005 09:50 PM

If you've got a good digital environment to do post-production sound, I'd suggest applying one of the above mentioned EQ curves and then side chaining a compressor to the teacher's dialog to do some automated dipping on her vocals whenever one of the onscreen subjects is talking. This is the easiest way to have the teacher's voice rise slightly back into focus whenever there is a sizable pause in the (as they called it in my school days) "socializing".
I'll post more about this if I notice your interest.

Best of luck, Dave.


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