Low RMS levels

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Re: Low RMS levels

Permanent link to this post Posted by kozikowski » Thu Feb 15, 2018 1:34 am

I have to unplug the connection to the computer from the Focusrite unit, plug it in again and jiggle it until I hear a little static in the earphones

Reading that again.

Jiggling a USB cable to make it work is broken. Either the cable itself (unlikely, if it's new) or the connection to the computer is bad. Can you plug it into a different socket? Even my little, naked MackBook Air has two, one on each side.

Just to be obsessive, a USB connection has to go through a negotiation and certification dance before it starts working. It's not like plugging in a desk lamp. You should be able to plug it in, wait a bit (one potato, two potato) and the system should wake up on its own. If it doesn't, repeatedly, that's a servicing call.

Koz
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Re: Low RMS levels

Permanent link to this post Posted by NilaJean » Thu Feb 15, 2018 2:51 pm

untitled.mp3
(480.61 KiB) Downloaded 1 time
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Re: Low RMS levels

Permanent link to this post Posted by NilaJean » Thu Feb 15, 2018 3:00 pm

Koz, you may be right, it may be a faulty usb port. I switched to another and Audacity recognized the Scarlett Studio. Thank you again. The recording I sent you still registered low RMS levels. If I adjust that, a number of other adjustments are needed to tweak it into passing ACX, but at least I get finally get "passed" now without distorting the original recording too much.

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Re: Low RMS levels

Permanent link to this post Posted by kozikowski » Thu Feb 15, 2018 4:07 pm

without distorting the original recording too much.

It shouldn't distort at all.

Your posted work should be in WAV (Microsoft) and not MP3. You have talking into a wine glass sound distortion and with an MP3, I can't tell where it's coming from. Please try to follow the directions in that page.

http://www.kozco.com/tech/audacity/Test ... _Clip.html


Do Not Help the sound. Record it, Cut it down (If needed), Export WAV and Post it. We need that 2-second silent pause.

Screen Shot 2018-02-15 at 8.03.04.png
Screen Shot 2018-02-15 at 8.03.04.png (41.65 KiB) Viewed 56 times


First three readings and sentence 2/3 down.

I'm not including a confirmation sound clip because it sounds awful.

I understand many clients want MP3 (including ACX AudioBook), but you can do that later, after you produce a perfect quality WAV file. All your client archive work should be in WAV and you should be able to point to two different places that hold your work.

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Re: Low RMS levels

Permanent link to this post Posted by NilaJean » Thu Feb 15, 2018 4:23 pm

I did not "help" the sound, I did exactly as you required. Sorry about the mp3, will redo in WAV. I have noted that using Noise Reduction to reduce the noise floor more than once to pass ACX does slightly distort the final sound.

As I mentioned, actually, in that recording, Audacity would NOT recognize the Scarlett Studio and I was forced to record on the internal mic, of course it sounds like I am in a wine glassl. Changing the USB port made the difference. I am truly grateful for your help and trying my damnedest to cooperate and learn.

The recording gain on this new file was a steady, albeit flickering, green. The knob is set at 12:15. I can only force it to reach red if I turn the gain all the way to the highest setting.

test .wav
(1.6 MiB) Not downloaded yet


Screen Shot 2018-02-15 at 8.16.38 AM.png
Screen Shot 2018-02-15 at 8.16.38 AM.png (134.1 KiB) Viewed 56 times


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Re: Low RMS levels

Permanent link to this post Posted by kozikowski » Fri Feb 16, 2018 3:00 am

of course it sounds like I am in a wine glassl.

Not of course. I was able to create a poor, but almost acceptable voice recording using the built-in microphone on my Air.

MBATestRaw.wav
(1.19 MiB) Downloaded 1 time


This is after the correction suite and a gentle noise reduction.

MBATestPatched.wav
(1.19 MiB) Downloaded 2 times


Screen Shot 2018-02-15 at 18.42.01.png
Screen Shot 2018-02-15 at 18.42.01.png (41.07 KiB) Viewed 48 times


Denise's voice in our Skype interview test was recorded from her MacBook Pro built-in microphone on her sun porch in New Jersey. Remember this is an engineering test.

http://kozco.com/tech/audacity/clips/De ... lyCut3.mp3

What can give you that distortion is the noise reduction setting in Mac preferences.

Apple (upper left) > System Preferences > Sound > Input.

Screen Shot 2018-02-15 at 18.33.40.png
Screen Shot 2018-02-15 at 18.33.40.png (11.6 KiB) Viewed 48 times


You can also create problems if you're not wearing good quality, sealed headphones, or have any of your own voice loose in the room with you.

Image

So, no. This honky, talking in a tube sound is not normal at all.

You're not following the Mastering Suite version 4 are you? Using those simple tools and very modest, single-pass noise reduction, I've been turning out all those corrected performances—including mine—with about 30 seconds of work.

This is the whole basic process.

Effect > Equalization > Select Curve: Low rolloff for speech, Length of Filter: about 5000 > OK.
Effect > RMS Normalize: Target RMS Level -20dB > OK.
Effect > Limiter: Soft Limit, 0, 0, -3.5dB, 10, No > OK.


In both our cases, I needed noise reduction, so there's that piled at the end.

viewtopic.php?f=64&t=96103

Post an uncorrected WAV when you get that far

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Re: Low RMS levels

Permanent link to this post Posted by kozikowski » Fri Feb 16, 2018 3:15 am

have any of your own voice loose in the room with you.

By that I mean the playthrough sound from Audacity or any of the other ways of listening to yourself in real time without headphones.

You can get that talking in a pipe sound because of other causes, but those are the normal ones.

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Re: Low RMS levels

Permanent link to this post Posted by NilaJean » Fri Feb 16, 2018 5:02 pm

Again, my gratitude. Loose voice and good earphones, check, no problem there. Mastering Suite, check, using it, however, I spent an hour or more going deeper into settings options and instructions, and have changed some of my settings. I ran two tests, and utilized different settings for rms and noise reduction based on the noise floor in the room at the time of each, and the corrected recordings reflected an improvement equal to your edited second clip...so I think I am making progress. Final ACX checks were good.

My Apple prefs > sound does not have the ambient noise reduction option.

I will try not to bother you too much, but really appreciate your expertise and prompt responses.

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Re: Low RMS levels

Permanent link to this post Posted by kozikowski » Fri Feb 16, 2018 8:12 pm

I'm fascinated that your voice doesn't have a clear, professional, "in person" quality. It's like you're constantly being filtered through a poor cellphone.

I had a thought earlier. Can you post 10 to 20 seconds of your studio performance? I'm clear if it's copyrighted work, etc, but some of this forum qualifies as educational and may squeak under that condition.
have changed some of my settings.

Perfectly possible. If your performance doesn't need the 3dB headroom that audiobooks need, you can process normally and Effect > Amplify to whatever the new value is.

Fair warning that you should stay away from punching your voice up against 0dB—as loud as possible. Converting between sound standards can change the volume slightly and a "normal" submission from you can turn into an overload violation by the time the client gets it.

Also fair warning the posted correction values are chosen to put your submission in the middle of the ACX AudioBook requirement values. And they depend on each other.

Still waiting on that clean WAV posting. Also, we haven't resolved that tiny blue wave problem. Bit at a time.

Isn't troubleshooting across multiple timezones fun?

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Re: Low RMS levels

Permanent link to this post Posted by NilaJean » Fri Feb 16, 2018 9:44 pm

Humming the tune "Here I go again, gonna take it slow again...."

You betcha, great fun. Multiple time zones? Hmmm, based on your Skype recording, you are PDT? Me too.

Uploading multiple files, and hopefully screen shots in order:
test raw.wav
(1.12 MiB) Downloaded 1 time

initial waveform.png
initial waveform.png (46.78 KiB) Viewed 33 times

initial acx check.png
initial acx check.png (129.92 KiB) Viewed 33 times

test edited.wav
(1.12 MiB) Downloaded 1 time
. (complete with a couple mouth noises, sorry)

Passed check.

RMS setting,-20.10
Noise Reduction 6, 6, 6 (required two passes)
Limiter, 0, 0, -3.5, 10
Equalization > flatten curve
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