When I try to mute a track by selecting the mute button (or opening the advaced audio mixer), it causes the video to go black. This occurs in the preview pane and output (output is simply a black screen. This occurs with any input file (from various sources) and any output file type. Screenshots below.
Hi
This is exactly what is supposed to happen with the track Mute selected. It will Mute whatever is on the track, Audio and Video. Your problem is that your "Progam Settings (E) > Audio / Video Tab > Timeline" - is set to show Audio and video on the same track. Take the tick out of the box and Audio will appear on track 2 which can then be Muted.
Ss
Hi,
To add to Scenestealer's comments, the last two versions of MEP for whatever reason set the default program setting to have the audio track "grouped" with the video track. I personally think that was a mistake on the part of Magix as it leads to this exact problem. As Scenestealer said, once you detach the audio from the video, you will be able to mute the audio only and not get a black screen.
George
Yes it's now the default, but easy enough to fix with a once only change to the "Video/audio on one track" setting -- Program settings >> Video/audio tab. I don't think previously you even got the option to have audio and video combined.