Each one of my files must have a noise floor no higher than -60dB RMS. Where exactly do I set this?
It’s best to set it by purchasing quiet equipment and then recording in a quiet, echo-free room. If you have traffic noise, record after midnight. If your noise is hiss (fffffff), it’s possible you’re going to have a bad day.
Record a 10 second mono test clip in your normal announcing style with the red sound meters peaking about -6. The first two seconds should be holding your breath and not moving at all (noise test).
Do Not apply filters or effects. We need a raw clip. Post it here.
That’s exactly what Ian did. He has the longest thread in the forum history. He took over a broom closet and set up shop in there to get away from traffic on La Brea Ave in Los Angeles. That’s only the isolation part. You also have to get rid of the “tight” sound by soundproofing the walls and floor.
He used actual, formal soundproofing panels. I’ve been known to do similar tricks with furniture moving pads.
Open up the clip you sent and turn on View > Show Clipping. Those three or four blasts of red on the timeline are overload points. It’s too loud. The sound will be a little crunchy…and it’s permanent. Overload is one of the good ways to kill your show.
I’m very concerned with what the clip sounds like. If you didn’t do any effects or filters to it, then the computer may be trying to “help you.” The noise segment has odd ‘talking in a wine glass’ sound and your voice is changing volume. I don’t think you’re doing any of that intentionally.
So before you start throwing coats and umbrellas on the floor, let’s get basic recording down.
Some Windows machines have other effects as well. Check in the control panels. I got stuck inspecting a Win7 machine that had sound effects running and nobody told me. None of the quality sound tests worked and I couldn’t figure out why.
Here’s an Audacity setup I’m developing. Right now, it’s only a response to another poster trying to pass ACX sound compliance.
I think the Pearl Harbor clip is close enough. The -6 recording thing is a worthy goal not a law. Nobody is going to come out with a stick and hit you if you go a little over. DO NOT go all the way up to 0. We picked -6 as a good compromise between overload (too high), noise (too low) and theatrical expression (too high and too low).
I’m generating a correction list for that last clip. Remember how you shot it.
You don’t have P Popping or other voice errors to need that blast filter… like this:
Do this to the clip to make sure we get the same results. You will need to install Steve’s special voice filter into the Equalization tool. Your microphone does something really wacky down in the earthquake tones and Steve takes care of it nicely.
Select the whole clip by clicking just above the MUTE button.
Install special voice filter:
Decompress that zip file into LF_rolloff_for_speech.xml
Effect > Equalization > Save/Manage Curves > Import… find and select LF_rolloff_for_speech.xml
Back in the equalizer: Select Curve > LF_rolloff_for_speech
It should look like the picture attachment. Don’t forget to push the Length all the way up.
Effect > Normalize > [X]Normalize to -3 [X]Remove DC
Hi there–sorry about the delay–work has been crazy this week.
Ok, here is a newly recorded Pearl Harbor clip and then I did all the things you told me to do. I still don’t exactly see the LENGTH ALL THE WAY UP thing in my Audacity 2.0.6–there’s nothing in my lower right on the screen.
When I was recording, I was sure to stay under -6 on those red bars, but once I applied all this stuff, now it seems to go to -3.