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How do you make sure you are hitting Nebula at -18dbfs?

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How do you make sure you are hitting Nebula at -18dbfs?

Postby mchillak » Thu Aug 05, 2010 3:47 am

Sorry for the dumb question. I'm very new to Nebula and i'm still trying to wrap my head around the work flow. Would I put some sort of gain plugin with a meter pre-nebula or is there an easier way?
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Re: How do you make sure you are hitting Nebula at -18dbfs?

Postby Mercado_Negro » Thu Aug 05, 2010 6:52 am

This is how I work (hopefully others will join us and share their methods):

1 - Download the -18dBFS tone from the attachment below.

2 - Calibrate your host meters with this signal.

3 - Insert a Nebula instance and check if "4 RMS 17" is set as metering scale.

4 - Check Nebula's meters:

Image

5 - Done, keep your tracks at this value (or below).

Image

After some tests I've come to the conclusion that a safe value for tracks is -12dB or -11dB (that's why I suggested to calibrate your host meters in the first place), look here, this is an example with Reaper and calibrated meters:

Image

To keep my tracks within this range I use 2 plug-ins, before and after each nebula instance (in my case, using Reaper, I use the JS effect "volume_pan"). I use 1 plug-in to control the signal that's going into Nebula and another one to compensate if needed (this is what we call "gain staging"):

Image
(click on this picture to enlarge and see all meters and descriptions)

Nebula
-18dBFS_Signal.wav
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Re: How do you make sure you are hitting Nebula at -18dbfs?

Postby mchillak » Sat Aug 07, 2010 2:12 pm

Fantastic! That makes sense.

Thanks.
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Re: How do you make sure you are hitting Nebula at -18dbfs?

Postby akb44 » Sat Aug 07, 2010 8:45 pm

Should Nebula always be run at -18dbFS rms?
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Re: How do you make sure you are hitting Nebula at -18dbfs?

Postby enriquesilveti » Sun Aug 08, 2010 11:44 am

-18dBFS as average level of audio signal is an European standard and means 0 VU. Nebula works like a analog hardware so use standards of the analog world > -18dBFS = 0 VU. If you work with 32/64 bits float system is almost impossible to distort but at the very end you must do a DA to listen into yours speakers in 24 bits fixed, so an average level of -18dBFS is a safe value.
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Re: How do you make sure you are hitting Nebula at -18dbfs?

Postby tumburu » Sun Aug 08, 2010 12:28 pm

"an average level of -18dB"
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Re: How do you make sure you are hitting Nebula at -18dbfs?

Postby enriquesilveti » Sun Aug 08, 2010 9:54 pm

"an average level of -18dB"


Edited
Enrique Silveti.
Acustica Audio customer and technical support.

MBP 11.5 (i7-4870 | 16 GB | 512 SDD)
SP4 (i5-6300 | 8 GB | 256 SDD)
RME UFX | PS Lyra2 | SD USBPre2
VM U15 | VM W10 | VM OSX 10.12
N4/NAT4 | SPX3 | RX5 | LN2C | Smaart8 | R5 | PT12 | PX10
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Re: How do you make sure you are hitting Nebula at -18dbfs?

Postby tumburu » Sun Aug 08, 2010 10:10 pm

Oh, sorry, this was not addressed to you. I was just emphasizing that we're talking about the average level, not the peak level.
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Re: How do you make sure you are hitting Nebula at -18dbfs?

Postby milosh » Thu Aug 12, 2010 1:14 pm

do you guys know if it is possible to calibrate meters in Ableton Live ?

cheers

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Re: How do you make sure you are hitting Nebula at -18dbfs?

Postby scooter » Fri Aug 13, 2010 7:58 pm

Wouldn't it be as simple as Normalizing the WAV file to -18dbfs "average" and not peak? Making sure to keep them at 32bit or 64bit float
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