Mastering

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TJB
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Joined: Sat Mar 21, 2020 3:03 pm
Operating System: Windows 10

Re: Mastering

Post by TJB » Thu May 13, 2021 8:32 pm

Koz, just for fun I went ahead and mastered the voice test just to see ..... and lo and behold, after mastering , everything was ACX OK.

So I thought I've been cured and went back and did another fresh recording, began mastering ot nd when I hit RMS Normalize I got the same problem back again ... the thick base line which seems to preclude me doing anything else with it.

Why did it work with your voice test ... and not when I recorded just now???

Double aaarrrggghhhh

kozikowski
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Re: Mastering

Post by kozikowski » Thu May 13, 2021 9:15 pm

I got the mastering to work, too, but I had to do some magic to get it there.

Screen Shot 2021-05-13 at 1.53.20 PM.png
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There is a very low pitch single tone riding through the file. 90Hz, if you're counting. 90Hz is not typical of heating, ventilation, or lighting in either Europe or the US, so I'm going with computer fan noise. Computer fan noise can come and go depending on how the computer "feels," so that can account for sometimes problems.

I did some pre-conditioning. 90Hz is not valuable sound, so I designed a notch filter to nuke it ahead of mastering.

Effect > Notch Filter: 90Hz, Q=3.

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That tone changes the shape of your blue waves and that screws up the tips and peaks. That's pretty unusual, but I guess you're just lucky that way.

See if that helps.

-65dB just passes the healthy noise tests. Yes it's quieter than the -60dB standard, but that's with no elbow room if something goes wrong. Comfortable elbow room is -65dB and you just struggle over the limit.

I would run Noise Reduction of the Beast (6, 6, 6) and that gives you a nice clear voice file that easily makes all the standards.

Screen Shot 2021-05-13 at 2.09.06 PM.png
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Remember, we're running notch before mastering.

Koz

kozikowski
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Re: Mastering

Post by kozikowski » Thu May 13, 2021 9:19 pm

If it fails again even with the magic, post 20 unprocessed seconds of the failed voice. With background sound/room tone if you can.

Koz

TJB
Posts: 153
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Operating System: Windows 10

Re: Mastering

Post by TJB » Thu May 13, 2021 10:46 pm

Worked once but then failed the 2d time. Per your request, here's 20 secs of a voice recording sans mastering
Audible Test 2.wav
(1.87 MiB) Downloaded 5 times

kozikowski
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Re: Mastering

Post by kozikowski » Thu May 13, 2021 11:58 pm

OK. That's it. That's the story-telling voice.

"Her husband, ...Drew Peterson..."

I applied that low-pitch notch filter to get rid of your computer fans, Mastering steps in order, and then Noise Reduction of the Beast.

Audible-Test-2_patched.wav
(1.87 MiB) Downloaded 2 times
Screen Shot 2021-05-13 at 4.28.46 PM.png
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Are you worried about blue waves that get so big they go off the screen and sometimes turn red with RMS Normalization?

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Don't be. That's normal with the Mastering process. Audacity's internal sound format doesn't overload and distort when the waves get too big. Gentle Limiter brings everything back down to normal. That's why you need to apply all three mastering tools in order and don't mess with them.

Mastering under Audacity 3.0.2 can be a single step now and you don't even get to watch it work.

I do hear a lot of other sounds in the background. Are you shifting around and bobbing and weaving while you read? That's not the best idea. There's nothing in the mastering process that can "follow you" when you change microphone spacing or do theatrical emphasis to make a point. Those might actually overload, although after mastering, that will just come across as "dense" or forced sound.

Are you wearing big sealed headphones while you record?

Image

That can go a very long way to keep your volume steady while you work.

Is that a grandfather clock with half-second ticks in the background? I have to lock my clock in the bathroom when I record.

Koz

TJB
Posts: 153
Joined: Sat Mar 21, 2020 3:03 pm
Operating System: Windows 10

Re: Mastering

Post by TJB » Fri May 14, 2021 1:44 pm

Koz, you're great to work with me on resolvijng this issue but this morning I did as you suggested:

Step 1: Did a recording (and I've attached the raw recording below for your review):
Audacity Test 4.png
Audacity Test 4.png (60.79 KiB) Viewed 102 times
Step 2: I did the mastering beginning with the Notch effect, followed by bass/treble ... filter curve ... and then RMS Normalize ... and as you can see from the attachment below, it didn't work. Altho the base line is perhaps not as thick, it nevertheless is there and precludes doing the rest of the mastering (Limiter and Noise Reduction)
Audacity Test 5.png
Audacity Test 5.png (79.05 KiB) Viewed 102 times
Co0lor me perplexed !!!

kozikowski
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Re: Mastering

Post by kozikowski » Fri May 14, 2021 4:53 pm

What does your Bass and Treble control panel look like?

Screen Shot 2021-05-14 at 9.42.08 AM.png
Screen Shot 2021-05-14 at 9.42.08 AM.png (60.69 KiB) Viewed 88 times

Koz

TJB
Posts: 153
Joined: Sat Mar 21, 2020 3:03 pm
Operating System: Windows 10

Re: Mastering

Post by TJB » Fri May 14, 2021 5:09 pm

Koz, 6.0 Bass; 4.0 treble and -3.0 volume

kozikowski
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Re: Mastering

Post by kozikowski » Fri May 14, 2021 6:08 pm

Thank you. You have have uncovered an odd reaction with the Bass and Treble effect. I posted a request for more INFO under the Mac forum.

Meanwhile.

What happens when you apply the limiter as published anyway?

Koz

TJB
Posts: 153
Joined: Sat Mar 21, 2020 3:03 pm
Operating System: Windows 10

Re: Mastering

Post by TJB » Fri May 14, 2021 6:51 pm

Koz, the limiter works just fine

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