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Old 11-05-2015, 04:57 PM
jgiannis jgiannis is offline
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Default ProTools Reference Level Settings (+10 dBu vs +24 dBu)

Hi.

I am running PT10 HD on OSX 10.7.5.

My interface is an AVID HD OMNI.

I use ProTools daily, but what I don't use too often is another piece of software that, I think, came installed with the HD OMNI. The program is called "Avid CoreAudio Manager."

When I open the program, it recognizes the HD OMNI as my interface. (It simply says "Interface: HD OMNI.")

Under the "HW Setup…" button, I click on the tab "Analog Out." I am then given a "Reference Level" for channel 1 through channel 8. Each channel allows me to select either:
(a) Speaker (+10 dBu), or
(b) Line (+24 dBu)

If I set them to +10, then my playback levels are quieter than if I set them to +24. However, the output meters on the OMNI do not change. The output meters give me the same reading, whether I select +10 or +24.

I am not sure which one is "correct," nor do I even understand what this stuff means. But this does affect me because I am currently trying to balance the overall levels of my session. If I am balancing them at +10, then I send my session to another party who has theirs set to +24, their ears will pop off.

Can anyone make sense of this?

Thanks!
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  #2  
Old 11-05-2015, 06:16 PM
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Top Jimmy Top Jimmy is offline
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Default Re: ProTools Reference Level Settings (+10 dBu vs +24 dBu)

The output reference level only affects the output level, not the level of what you are doing in Pro Tools. This setting is designed so that you can feed the output to other gear or an external monitoring controller at +24 peak. If you are going to feed powered monitors directly from the Omni, it's better to use the +10 peak setting so that you get full resolution with the volume control rather than blasting the speakers with the volume only up 25%.
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Old 08-04-2017, 10:59 AM
sailor sailor is offline
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Default Re: ProTools Reference Level Settings (+10 dBu vs +24 dBu)

Quote:
Originally Posted by Top Jimmy View Post
The output reference level only affects the output level, not the level of what you are doing in Pro Tools. This setting is designed so that you can feed the output to other gear or an external monitoring controller at +24 peak. If you are going to feed powered monitors directly from the Omni, it's better to use the +10 peak setting so that you get full resolution with the volume control rather than blasting the speakers with the volume only up 25%.
Resurrecting this old discussion about analog output levels on the Omni...

I'm looking into getting an Omni and feeding the outputs 1-6 to a surround receiver which has power for passive speakers. I'm assuming the receiver uses the "consumer" -10dbV operating level so I wouldn't want to feed it the +24dBu-peak line level out of the Omni.

So could the +10dBu peak out level be considered roughly analogous in practical use to the -10dBV nominal operating level? Those conversions still throw me off.

Appreciate it if you or someone can confirm for me.
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Old 08-07-2017, 06:49 PM
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Default ProTools Reference Level Settings (+10 dBu vs +24 dBu)

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Originally Posted by sailor View Post
So could the +10dBu peak out level be considered roughly analogous in practical use to the -10dBV nominal operating level? Those conversions still throw me off.
Very roughly, yes. If used full scale, the -10dBV level reference would have about 17 dB of headroom from the Omni.




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James Cadwallader

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Pro Tools HD 12.8.1, Mbox3, MOTU PCI-424 w/ 2408mkII & 1224 (Mac)
Pro Tools 11.3.2, Mbox2, Focusrite Scarlett 18I8 (Win 7)

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Old 08-11-2017, 01:49 PM
sailor sailor is offline
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Default Re: ProTools Reference Level Settings (+10 dBu vs +24 dBu)

Great, thanks for the confirmation.
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