Good afternoon, this problem arose when I updated Vegas 21 to version 300. I really hoped that the new version 315 would fix this! But the problem did not go away. At first I thought the problem was due to too much material, so I added only 8 hours and ran into the same problem - the sound just couldn't be seen on the track! I contacted technical support and was advised to disable "legacy avc decoding". I'd like to point out that this did fix the problem, but another one popped up! If earlier 8 hours were loaded in 5-10 minutes, now one file takes about 3 minutes to load, in the end I have to wait about 2 hours, after which Vegas starts to lag terribly! Will you advise me to download version 208! I would do that, but the problem is that I purchased Vegas 21 on Steam! I have to use Vegas 18, where everything works fine. Maybe someone knows how to fix this problem?
I demonstrated the problem on video.