Hello.

When you save a project, you do not save the preferences of the project.
Working with different audio adapters makes it longer to configure.

Example : my project named "tascam" uses a stereo sound with my Tascam US 600 Asio usb box:
http://dominotes.fr/vegas/tascam/t2.jpg
http://dominotes.fr/vegas/audio/s2.jpg
I do all the job on the timeline and save this project.

Now, I prepare a new project with the 5.1 settings, on my Creative Asio card
http://dominotes.fr/vegas/audio/s1.png

I might not be able to set my 5.1 loudspeakers as the settings are greyed (unavailable).
http://dominotes.fr/vegas/audio/pasdechoix.jpg

A reboot solves this problem:
http://dominotes.fr/vegas/audio/choix.jpg

Now, I do all the job on the timeline and save the new project.

I close this new project.

I open the previous "tascam" project made with the Tascam Asio device, and my settings are wrong :
http://dominotes.fr/vegas/audio/choix.jpg
instead of
http://dominotes.fr/vegas/tascam/t2.jpg

Please Sony developpers, could you check this for a future upgrade of Vegas 13 ?
Thanks in advance.