Audio hiss/hum... advice?

S

sonofaresiii

Well-known member
Hey guys, I recorded some audio with a rode NTG-2 I got recently, and it sounds bad... I mean really bad. I know there's a TON of things I did that was causing bad audio, but I want to know exactly what it is that's making it THIS bad, because most of the problems are fixable by spending money and i only have enough to fix one thing.
I'm really hoping someone will give this audiotrack a listen and see what they think the issue is.

Here's the problems, as far as I know:
NTG-2 was mounted on my canon 7d and plugged directly into the 7d. Which means autogain, and that the mic was far away from the subject. Furthermore, any noises caused by the camera would have been caught by the mic. Also, it might have been a shitty cable. it was a 6-inch XLR to mini-male cable.

The whole thing was shot in an enclosed apartment so there's no problem with wind or anything. I do know that the fridge is on, but i have listened to it enough i can isolate the fridge hum, and there's tons of static besides it.


Thanks for the help.

Here's the raw audio
http://www.mediafire.com/?r0ozwtm2mag
 
I did same thing and thought it was the cable, but then I listened to it in an amplifier and it was clean so all that is caused by the AGC. Pray for Magic Lantern.
 
Try this; http://www.beachtek.com/dxa5d.html

I bought one (about $250) and the AGC hiss is a problem no longer. There is a switch on the unit that engages a -20db tone below human audibility which tricks the camera into not activating the AGC during silent moments. Works like a charm, broadcast quality audio with proper microphone inputs. Works with the 7D and 5D.
 
Auto gain is bad, but if there was a lot of distance between the mic and the sound source you are going pile on the noise. I really recommend you get a Zoom H2 for an instant fix for $145.
 
Yeah if I had the money to spend I'd get either the zoom h4n or the beachtek, but I need something within the week so, DrDave, if you think the h2 will do a decent job i may be able to spring for that.
and yeah for that particular shoot i had a lot of space between the subject and camera, i'll try to cut down on that in the future.
 
I use the Sennnheiser ew100G2 wireless receiver and sennheiser skp100g2 with a senssheiser e835 mic ,
i get very good audio, make shure the rf out level is --18, and Sqelch low,
works like a charm crystal clean audio,
went trough a lot of pain with the audio , so now i share my secret....
 
Last edited:
You must log in or register to reply here.
Back
Top