-
Sound Question
Some clips reaching -6db are showing a bassy distortion. Basically clips with sudden rises reaching -6 db (my max db allotment for the project) It’s hard to explain really, I’m not sure what the technical term is for this and I’d like to know. I can use EQ to get rid of the noise, but they are all dialogue clips. Again the distortion only occurs in clips with an abrupt and loud raise in loudness.
-
14 Replies
-
Also I can bring the levels down to -12 db and get rid of the distortion and have used no compression. The distortion is present in the original file.
-
How are you monitoring this distortion?
-
Ah yes, it only appears in my headset, it’s just a cheap phillips that I like to use for tonal discrepancies. Surround system it is not present, but then again most distortions aren’t as present. I’ll send you the clip if you’d like and thanks for reply
-
If you sent it, I would take a listen.
Jeremy
-
Here’s a dropbox link, a lav mic was used, I left in for you though I removed it, and did not alter the file. The distortion occurs at 1:04 at the lines “Huh, Huh!” and only when it’s raised to -6b. This same problem occurs other places, very rarely, but common factor is an abrupt change in dynamic range and loudness.
The less clear voice is just someone feeding lines of camera so please ignore. Thanks
-
Thanks.
I think the link is broken, though.
Jeremy
-
Okay, I’ll put it up again and send the link, I believe that it is a transient impulse low frequency noise cause by interference, and it resonates into the voice. I’ve been doing research and have found little information on how to remove it.
-
-
Hi.
I’m away from the studio, but I took a listen and will be able to take a better listen next week, but it appears Ch1 is a better recording than Ch2. Right after the section you mentioned 1:04 there seems to be what sounds like a bit of friction or clothes rustle that isn’t apparent on Ch1, and then it seems like it might just be a weak wireless connection. What is going on in the video? It seem like there’s a bit of turmoil perhaps the mic got repositioned/covered/moved out of place during the commotion.
I’d just use Channel 1.
There’s a little more room noise/reverb, but that might be OK. Are you planning on taking this out to an audio mix?
Jeremy
-
Yes the channel 2 is a lav mic, 1 is the boom, so for the most part I just used the boom mic. They are in a small room so I don’t mind the reverb too much, though I did run a very slight dereverb on the shots where I only used the boom. I don’t know if I mentioned this but the other actor is a grip reading off camera so his voice doesn’t matter. What’s really bothering me is the “huh, huh” line. A very subtle low frequency noise which I think is a low frequency transient impulse causing it. I’ve done some research on it and all I can find is grad papers suggesting algorithms to fix it, but they are way over my head. I’m a director not a sound engineer.
Reply to this Discussion! Login or Sign Up