5.1 Project, but sound only outputs to R speaker!

Sykes wrote on 10/11/2011, 3:46 AM

Everything seemed fine in Vegas timeline, all voices, audio music are nice and balanced but once after it is rendered using the 5.1 Surround DVD AC-3, the background 'music' portion of the audio mostly outputs (about 90%) to the right speaker. The voices are okay though.

Another problem, when I tried to combine 'rendered' projects such as retrieving mpeg-2 and the audio portion (ac-3), Vegas couldn't import the audio and there are no ac-3 files showing when I try to retrieve from the explorer under Vegas' 'Import Media'.

Comments

Jack S wrote on 10/24/2011, 10:10 AM

Hi
I don't know about your first problem but your second problem is a known bug. VMS will not currently recognise ac3 files.
If you need to bring your rendered movie back onto the timeline you will have to render it as a combined mpeg-2 video and audio stream.

Marco. wrote on 10/24/2011, 6:20 PM

Do you listen to a 5.1 output or to the stereo downmix which will be automatically done if no adequate sound card (with 6 discrete output channels) is used?

If you listen to a stereo output you will probably hear the Lt/Rt downmix where a phase shifted signal from the surround channels will be added to left and right (in different ways). Dependend on the signals in your 5.1 signal this can erase portions of a signal of a certain channel.

Your 5.1 signal will be fine then anyway.

To overcome the downmix problem (which actually is not a bug) you should either modify your 5.1 mix with signals in the surrounds which would not affect the front channels in the way it happens. Or you can manually downmix to Lo/Ro instead (deselect the phase shift and set the advanced bit stream to "prefer Lo/Ro mix").