Removing unwanted Hum/His From Audio/Video Track?

C

Cieloent

Well-known member
I have a little intro I'm doing for a project where I recorded the talent with the a shotgun mic on my DSLR ( Canon). The problem is that the auto gain has almost destroyed the audio. I don't need it to be amazing but at least a little better than this.

When I tested the Mic in a controlled environment with no Ambient sounds it sounded pretty descent, but outside it truly sounds horrible imo.

So my question is to any users who have recorded audio with their HDSLR Camera is their anyway to fix it in post?


Thanks
 
Without actually hearing what you're hearing, it's nearly impossible to give you an accurate reply. If you have a chance, post a sample.

That said, you're up against a few (potential) things here. AGC is quite hard to counteract after the fact. You can try very careful use of an expander, but don't expect miracles.

Then, there are the hum and hiss you included in the thread title. Those can result from several different causes, and again without hearing it I can't figure out what you're dealing with. "Hum" is generally lower-frequency noise. Sometimes, a lo-cut/hi-pass filter will do the trick. Other times, the hum spans a larger part of the spectrum and you have to get into fun things like comb filtering.

Hiss is generally high-end, and a hi-cut/lo-pass may do the trick. But if you drop much below 10kHz, you may lose important parts of your sound.

These are all broad generalizations. Once we can hear it, hopefuly we'll be able to give you a better plan.
 
C2V said:
Without actually hearing what you're hearing, it's nearly impossible to give you an accurate reply. If you have a chance, post a sample.

That said, you're up against a few (potential) things here. AGC is quite hard to counteract after the fact. You can try very careful use of an expander, but don't expect miracles.

Then, there are the hum and hiss you included in the thread title. Those can result from several different causes, and again without hearing it I can't figure out what you're dealing with. "Hum" is generally lower-frequency noise. Sometimes, a lo-cut/hi-pass filter will do the trick. Other times, the hum spans a larger part of the spectrum and you have to get into fun things like comb filtering.

Hiss is generally high-end, and a hi-cut/lo-pass may do the trick. But if you drop much below 10kHz, you may lose important parts of your sound.

These are all broad generalizations. Once we can hear it, hopefuly we'll be able to give you a better plan.
Click to expand...



Thank you for the excellent post I will post the clip later today when I get home. But basically it is audio of me recording someone outside and it just sounds really bad. Shotgun Mic on a DSLR I already see still is no good.

I need to invest into a better sound system for these certain situations where I need them ( 1/4 of the time )
 
Cieloent said:
Shotgun Mic on a DSLR I already see still is no good.
Click to expand...

Remember that audio is, and always has been, the bastard child of camera design and manufacturing. Granted, some higher-end cameras are actually pretty good (in relative terms), and even the DVX got a great reputation for palpable audio recording. But we're in new territory now with the DSLR movement, and it seems that the clock has been reset on everything we've learned about camera audio.

It's improving with things like the new 5DmkII firmware update that allows for defeatable AGC and manual level controls, but we still have a long way to go. Second system is going to be better than DSLR in-camera audio.
 
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