Tracks not producing sound in 1.2.6

[maxgoof]

After recording and working with several tracks and moving them around, vertically, changing their position, some of the tracks stop producing sound. You can still see that the track has sound, but it will not play, it will not copy/paste, it will not export to wav or mp3.

Anyone else encounter this problem, and found a solution?

[kozikowski]

Yes, it happens a lot, but not for the reasons you think. Audacity doesn't keep music inside itself unless you set it to do that in Preferences. It uses clips, songs, segments, and snippets that you give it, and it keeps doing that until you Export As WAV or Export As MP3. This means if you use a Music CD song in your show and then take the CD out, your show drops dead. This also happens when people clean up or move things around or create new folders in the middle of a production. Zap. No more music. You have to leave everything alone until you're ready to Export.

You can also get this is you have a damaged AUP (music manager) file, try to move a Project to a different computer, or fill up your hard drive, but it's much more likely that you did something by accident.

The blue waves on the screen are created by two graphic files and can easily get out of step with reality. The person holding the CD that they just took out of the machine looks over and says, "I know the music is there, I can see it!"

Actually, they need to put the CD back in.

Edit > Preferences > Import/Export > Always Copy Music...Safer. This setting may slow down large productions, but it doesn't have that Missing Music problem.

Koz