TASA Testing

[sound_smith]

I am trying to run TASA testing
http://tasatrailers.org/whatis.html on 5.1 trailers to verify if they meet the standard.

I am using the Waves WLM Meter plug-in, with the TASA LEQ-m preset, and getting varying results. This is alarming. The exact same test parameters with different LEQ integers.

I am wondering if when running the AudioSuite render there could be variance in how the application sums. In-line RTAS passes seems to be more consistent, but still waivers. Without exact matches how can I purport to qualify anything under this standard?

Does anyone have experience with this? Is LEQ testing known to be faulty or un-quantifiable? I don't understand where the leak is.

Thanks all!

[its2loud]

I’ve always used it as a real time plugin. Never had any issues with accuracy. Checked it against Dolby Media Meter. Perhaps it’s an Audio Suite thing.

[sound_smith]

Thanks, its2loud!

Are you comparing the WLM Meter to the Dolby-certified tool?
Doesn't the Dolby tool not have integers?
Do you know how its rounding?
Do you get the same result when performing multiple passes?

[its2loud]

Originally Posted by sound_smith

Are you comparing the WLM Meter to the Dolby-certified tool?
Doesn't the Dolby tool not have integers?
Do you know how its rounding?
Do you get the same result when performing multiple passes?

I’m comparing WLM to DMM. Both showing the same number. I don’t use DMM anymore and I’ve never gotten anything kicked back for using WLM.

I can’t speak about integers. I select LeqM and just measure.

Do you mean if it’s rounding up or down? No idea. I just mix to 85 or lower

I get the same result on multiple passes unless I change the mix.

If you want a third measuring option Nugen’s VisLM 2 does TASA measurements.

Hope that helps

[sound_smith]

Thanks a lot I appreciate your help. In our experience we get inconsistent results when using the AudioSuite Render function. Only RTAS yields replicatable results. The Dolby unit is doing rounding but at what threshold I can't be sure.