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Attenuate audio post-master-fader

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Ernest Rosado
Attenuate audio post-master-fader
on Sep 20, 2014 at 3:00:42 am

Hi guys,

I want to change the 0 on my final audio mixdown to -1.5dB.

Imagine I do my audio render to a .wav file in Vegas. Then I re-import that same .wav file into a new Vegas project, and reduce its volume to -1.5 dB. The new "max" it can reach is -1.5.

Is there a way to do that in the original multitrack layout without bringing it into a second project? If I just bring the volume of the master fader down to -1.5, the sum of the various tracks can still spike the master volume over -1.5.

I do NOT want a compressor. Need to keep this audio sounding as faithful as possible.

Thanks in advance for any insights!


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Graham Bernard
Re: Attenuate audio post-master-fader
on Sep 20, 2014 at 9:42:32 am

I'm NOT an Audio specialist, but I do "Ride" the Audio Master Track with an Audio Envelop using LATCH?


Now, in VP13 we have LOUDNESS Meters, which give us a recorded point in TIME just where things get too loud - yeah... Loudness Meters ;-). I just used them (kewl!!) to establish just where I was getting PEAKS. I'm thinking I could use this in the future to them go-back to a HOT Spot and adjust the Audio Envelop.

Maybe there is a much simpler way? Or I have got this front to back? In any event, I got a continual +7.1db down to -1.1db, and this woitin the Original Vegas Project.

Is this what you wanted?

Grazie

Video Content Creator and Potter
PC 7 64-bit 16gb * Intel® Core™i7-2600k Quad Core 3.40GHz * 2GB NVIDIA GEFORCE GTX 560 Ti
Cameras: Canon XF300 + PowerShot SX50HS Bridge


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John Rofrano
Re: Attenuate audio post-master-fader
on Sep 24, 2014 at 11:53:06 pm

[Ernest Rosado] "Is there a way to do that in the original multitrack layout without bringing it into a second project? If I just bring the volume of the master fader down to -1.5, the sum of the various tracks can still spike the master volume over -1.5."
Then your zero is not really zero. Your zero is really clipped audio that is above zero but can't be displayed because zero is the max. (hint: if the red light above zero is on, you have clipped audio)

If your audio doesn't go above zero and you reduce the master fader by 1.5dB your audio will never go above -1.5dB. The fact that it does means you need to remix your audio because your levels are too hot.

~jr

http://www.johnrofrano.com
http://www.vasst.com



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Ernest Rosado
Re: Attenuate audio post-master-fader
on Sep 25, 2014 at 7:48:17 am

Thanks for your reply. I get that my 0 is actually overmodulated, I'm okay with the clipped audio. Remixing everything to be perfectly below 0 is not practical as I have to crank out about 80 hours of produced audio a week, so it's quantity over quality. But the radio station software that this audio gets loaded in literally crashes if the audio hits 0, it MUST be attenuated to -1, I use -1.5 to be safe.


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John Rofrano
Re: Attenuate audio post-master-fader
on Sep 25, 2014 at 10:58:43 am

[Ernest Rosado] "I get that my 0 is actually overmodulated, I'm okay with the clipped audio."
You're OK with clipped audio but you won't use a compressor!!! Clipped audio is an unacceptable loss of audio signal. If you aren't willing to remix then you need to use a compressor and bring your audio back under control. You said you want to keep the audio "sounding as faithful as possible". Clipping is a digital artifact and is in no way, shape, or form, "faithful" to the original sound since it does not occur in nature.
[Ernest Rosado] "Remixing everything to be perfectly below 0 is not practical as I have to crank out about 80 hours of produced audio a week, so it's quantity over quality."
OK, so now that you've admitted that quality is a secondary concern. You should learn to use a Brick Wall Limiter like Wave Hammer. It will gently keep the peaks under control while not affecting the rest of the program material and it will sound way, way, better than digital clipping.
[Ernest Rosado] "But the radio station software that this audio gets loaded in literally crashes if the audio hits 0, it MUST be attenuated to -1, I use -1.5 to be safe."
Here is what you need to do: Put Wave Hammer Surround on the Master Audio Bus. Start with the [Sys] Master for 16-bit preset. Go to the Volume Maximizer tab and set the Output Level to -1.5dB. Nothing will go above -1.5dB. Use the Threshold to determine how much of the program material is affected by the compression.

~jr

http://www.johnrofrano.com
http://www.vasst.com



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Ernest Rosado
Re: Attenuate audio post-master-fader
on Sep 26, 2014 at 3:18:06 am

Just for the record, the reason I don't want to use a compressor is because the radio station where this will be broadcast is already SUPER compressed by the time the audio hits the air, so it will in effect be compressed twice if I go that route.

I will give the Wave Hammer a try, thank you very much!


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John Rofrano
Re: Attenuate audio post-master-fader
on Sep 26, 2014 at 12:14:46 pm

[Ernest Rosado] "Just for the record, the reason I don't want to use a compressor is because the radio station where this will be broadcast is already SUPER compressed by the time the audio hits the air, so it will in effect be compressed twice if I go that route."
What you need to understand is that the radio station's compressor is only going to compress the audio that is above their threshold. Any audio below the threshold will not be compressed. So it's not like an EQ where boosting a frequency twice is additive and undesirable. Most audio mixes have a compressor on every track and then an overall compressor on the mix. You should not be afraid of using a compressor tastefully. Obviously over compressing is undesirable but, as you said, the radio station is going to do that anyway.

~jr

http://www.johnrofrano.com
http://www.vasst.com



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