Noise Reduction remnants.

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Re: Noise Reduction remnants.

Permanent link to this post Posted by kozikowski » Mon Feb 26, 2018 9:16 pm

I didn't pull down the instructions for this microphone, but my impression is the switches are reversed. I can check.

The circle and heart switch changes from receiving sound from all directions (circle) and receiving sound mostly from the front. If you have room noise, it's totally recommended you select the heart position and aim its back toward your noises.

You can figure out which one is front by selecting the heart and speak into both sides. Only one of them is going to work right.

The other switch may work well in the "L" setting. That's the one that suppresses rumble, wind and popping breath noises.

You might make simple voice tests in both positions. You are listening for the ballsy, firm, low pitch "broadcast" sound in your voice to come and go. The -10dB third setting just reduces the voice volume. Not recommended in your case.

If you do that test, post some of it. It would be good to hear what it does. Announce as you go. "This is the flat setting, Testing One Two Three Four Five. This is the "L" setting, Testing.....

The "L" setting is really the high pass filter. Allow everything but the bass notes to go through. That's it's official name.

Koz
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Re: Noise Reduction remnants.

Permanent link to this post Posted by kozikowski » Mon Feb 26, 2018 10:11 pm

This is where that "L" comes from. It's roughly the pattern the equalizer tools makes when it's suppressing bass notes (thin green line). Click the graphic.

Koz

L-Equalizer.jpg
L-Equalizer.jpg (117.12 KiB) Viewed 361 times
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Re: Noise Reduction remnants.

Permanent link to this post Posted by MichloIW » Tue Mar 06, 2018 1:40 am

Thank you again, Koz.

I'm not ignoring your requests. I shall get to them as soon as I'm rid of this blasted cold. :(

Cheers.
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Re: Noise Reduction remnants.

Permanent link to this post Posted by kozikowski » Tue Mar 06, 2018 9:33 pm

I'm rid of this blasted cold.

So that means you have a ballsy, announcing voice now, right?

"In a World..."

Get all the good quality stuff down before you get better.

Koz
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Re: Noise Reduction remnants.

Permanent link to this post Posted by MichloIW » Thu Mar 08, 2018 2:57 am

kozikowski wrote:
I'm rid of this blasted cold.

So that means you have a ballsy, announcing voice now, right?

"In a World..."

Get all the good quality stuff down before you get better.

Koz


Haha, I ended up having to record the opening and closing credits of this book with my "cold" voice. It doesn't even sound like me. Just watch people starting asking me to do THAT voice. I'll have to be like Phoebe on Friends, trying to catch a cold all of the time. ;)

Cheers.
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Re: Noise Reduction remnants.

Permanent link to this post Posted by kozikowski » Thu Mar 08, 2018 7:08 pm

Hey, that's terrific. Can you do my book in that voice?

Koz
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Re: Noise Reduction remnants.

Permanent link to this post Posted by MichloIW » Mon Mar 12, 2018 8:10 pm

Here it is. You like it, Koz? ;)
Attachments
STLUT - 21 - Closing credits.mp3
Closing credits with unwell voice.
(1.08 MiB) Downloaded 9 times
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Re: Noise Reduction remnants.

Permanent link to this post Posted by kozikowski » Mon Mar 12, 2018 8:33 pm

"Narrated by Ian M. Walker...."

Perfect. You should do them all that way.

Fair warning ACX expects all the chapters to match, so that may be a juggling act.


Your clip passes ACX perfectly, but I didn't use the standard corrections. Instead of the first tool, Equalization, I substituted Effect > Notch Filter: 120Hz, Quality 2. Then RMS Normalize and Limiter.

Screen Shot 2018-03-12 at 13.29.31.png
Screen Shot 2018-03-12 at 13.29.31.png (47.89 KiB) Viewed 225 times


Didn't need noise reduction.

Koz
Attachments
STLUT - 21 - Closing credits-patched.wav
(2.38 MiB) Downloaded 6 times
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Re: Noise Reduction remnants.

Permanent link to this post Posted by MichloIW » Wed Mar 21, 2018 6:46 pm

Har har. Nope, I'm not getting that cold again, sorry. :P

Wow, no noise reduction?! That's incredible. It does sound good, though. How did you work out what to target with the notch filter?

Well, I just got my microphone back and yay, there are no issues with it. :) When he dropped it off he checked my setup in the booth and discovered that the previous person I'd had in to check it all out had set things too high (gain all the way up, things like that). He did some tweaking and we did a comparison recording of one of the chapters and it was like night and day, barely any noise.

So, it seems it was the fact that the microphone had gone into omni-direction AND the settings being wrong. :)

I shall give you one more sample with the new settings soon.

Thank you for all of your help and feedback, as usual, Koz.

Cheers.
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Re: Noise Reduction remnants.

Permanent link to this post Posted by kozikowski » Wed Mar 21, 2018 9:08 pm

How did you work out what to target with the notch filter?

Two things happened there. If you're going to have motor or environment noise in the US, it's generally going to happen around 60Hz and 120Hz. The power in our walls runs at that pitch. In Britain it runs at 50Hz and 100Hz. So even without knowing anything else, I got the neighborhood nailed.

My refrigerator runs at 120Hz.

I selected a portion of background sound (not your voice) and used Analyze > Plot Spectrum. It's pitch (frequency) along the bottom and loudness top to bottom. Click the graphic if it doesn't fit on the screen.

Screen Shot 2018-03-21 at 13.53.51.png
Screen Shot 2018-03-21 at 13.53.51.png (49.19 KiB) Viewed 190 times


There's a big spike at 120Hz (read along the bottom) with shorter ones to the left. The only serious one is 120Hz. That one is clearly audible and its the loudest one. The tones to the left aren't nearly as loud and they are tones such as thunder, earthquake and pipe organ bass notes. Easy to ignore.

Koz
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