LFE cutoff for DVDA

the_learninator wrote on 7/14/2004, 7:52 AM
Hey somebody, anybody...

what is the LFE cutoff frequency for DVD-A
I read in Vegas that the LFE won't work unless you set the LFE cutoff Frequency in Vegas to the authoring program (in this case DVD-A) I've been searching all over and haven't found any answers. When I play the project in Vegas the bass is thumping like I want it to! but when I render the project mpg and ac3 and play it in dvd-a nothing is coming out of my sub??? I have everything correct. Enabled LFE in audio properties on vegas and set to defualt of 120 Dobly Pro film. Look forward to hearing your replies.

Comments

ScottW wrote on 7/14/2004, 7:56 AM
What happens if you actually burn something (say an RW) and try it in a player. My bet is it's just the preview mode of DVDA can't handle this, but a DVD that was burnt would be fine.

--Scott
bStro wrote on 7/14/2004, 9:04 AM
I think the manual / Help section just wants you to be aware of any limitations that your surround authoring application has. It's not "your authoring application has restrictions, go see what they are"; It's "go see if your authoring application has any of these restrictions"

To the best of my knowledge, the AC3 encoder that comes with Vegas/DVDA does not have such restrictions. BTW, as long as you're rendering your AC3 in Vegas, it is your "authoring application," not DVDA. The manual is referring to whatever you use to actually encode the final surround sound file (in case you're only using Vegas to, say, render out the individual channels and something else to combine them). If you do happen to render out separate channels or leave the audio in the mpeg file, DVDA uses the same encoder that Vegas does.

At any rate, I don't think the Dolby Digital AC3 encoder has the restrictions that the Vegas manual indicates, but you might want to check out the AC3 Encoder forum here.

when I render the project mpg and ac3 and play it in dvd-a nothing is coming out of my sub?

DVDA doesn't preview in 5.1. Even if it did, I imagine it would sound just the same as it does in the Vegas preview.

Rob