Measure between -23dB and -18dB RMS.

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Re: Measure between -23dB and -18dB RMS.

Permanent link to this post Posted by steve » Sun Jan 26, 2014 9:53 pm

You will need to juggle with the compressor and the Amplify (or Normalize) effects to get both the peak level and the RMS level within the required ranges.
9/10 questions are answered in the FREQUENTLY ASKED QUESTIONS (FAQ)
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Re: Measure between -23dB and -18dB RMS.

Permanent link to this post Posted by Luckylolarose » Mon Feb 01, 2016 11:53 am

Thanks so much for all the above, it;s really helpful.

I have used compressor, and then amplified but then normalized so peak is -3DB but everytime I check after normalizing the RMS has been reduced. Don;t know how to keep peak and -3DB and keep RMS between -22 and -18, do I just keep fiddling around? Or is there anything else I can do?
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Re: Measure between -23dB and -18dB RMS.

Permanent link to this post Posted by kozikowski » Mon Feb 01, 2016 5:41 pm

Two years?

I have a step by step process for this, but we need to wait so I have access to a real keyboard.

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Re: Measure between -23dB and -18dB RMS.

Permanent link to this post Posted by kozikowski » Mon Feb 01, 2016 8:27 pm

Open a segment of the show before you did anything to it. The raw performance.

Do you have ACX-Check? Highly recommended. It's an analysis tool that reads you all the ACX specifications in one shot. I have an analysis page that tells you all the things you have to do to get the same information without acx-check. It's not pretty.

http://wiki.audacityteam.org/wiki/Nyqui ... #ACX_Check

Once you have acx-check running and the raw performance on the timeline, Normalize so we can start from somewhere predictable. Modern microphones assume a crisp and sharp voice is highly desirable and that sound frequently fails ACX. It's a chasing tail thing.

-- Select the whole clip or show by clicking just above MUTE.
-- Effect > Normalize: [X]Remove DC, [X]Normalize to -3.2 > OK


-- Select the whole clip or show by clicking just above MUTE. (just to make sure)
-- Analyze > ACX Check.


Screen capture the analysis panel, or write down the top three readings, Peak, RMS (loudness) and Noise. We only need the dB readings. I assume it's not going to pass.

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Re: Measure between -23dB and -18dB RMS.

Permanent link to this post Posted by kozikowski » Mon Feb 01, 2016 8:28 pm

Write back wherever you get stuck. I plow on until someone stops me.

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Re: Measure between -23dB and -18dB RMS.

Permanent link to this post Posted by kozikowski » Mon Feb 01, 2016 9:06 pm

English version of the readings.

Peak. Look at the blue waves on the timeline. The very tippy-top of the waves is never allowed to go all the way up (or down). That's an overload specification (1.0 on the timeline -- 0dB on the bouncing sound meters). That can cause audible crunching and distortion. ACX doesn't even want you to get close, so that's their -3dB (70%) limit.

RMS. Loudness. Root Mean Square is a standard electrical measurement which, when applied to audio, happens to work out to loudness.

Noise. How loud is the show when you stop talking? This can be a combination of dogs barking next door and the ffffffff noise the microphone is making. All of it lumped into one number.

And yes, it's perfectly possible to have a performance that won't meet all three at the same time. It's distressingly common.

It's also possible to pass ACX-Check and still fail acceptance. If you got there by heavily processing and beating your voice to death, the work will fail Human Quality Control later. The failure is "Overprocessing."

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Re: Measure between -23dB and -18dB RMS.

Permanent link to this post Posted by kozikowski » Tue Feb 02, 2016 7:23 pm

Or is there anything else I can do?

Did we lose you?

Many people want us to tell them how to push a button and Everything will Be OK. Not so far. Everybody's voice, environment and microphones are different, but you all have to fit into the same sound standards. It's very much a "stop by the store for a fitting."

You can also record a test sound clip and post that.

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

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Re: Measure between -23dB and -18dB RMS.

Permanent link to this post Posted by Dana_Tucker » Tue Feb 02, 2016 7:40 pm

Luckylolarose wrote: Don;t know how to keep peak and -3DB and keep RMS between -22 and -18, do I just keep fiddling around? Or is there anything else I can do?


I just put up a video on this issue, or at least part of this issue. It may help. If you want to resolve this issue, we can hook up via the www and I can capture your screen and walk you through the process. You can view the video here. Scrub to 9 min and then listen. https://youtu.be/JsJkUkvLZUk. It won't cost you a dime.
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Re: Measure between -23dB and -18dB RMS.

Permanent link to this post Posted by DL Voice » Fri Feb 05, 2016 5:22 pm

I just tried to watch the video, but it's gone. :/
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Re: Measure between -23dB and -18dB RMS.

Permanent link to this post Posted by kozikowski » Fri Feb 05, 2016 5:49 pm

The videos are being improved for your viewing pleasure.
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