Hi...apologies in advance for the long post!
I came across this issue today on coming back to a project I haven't worked on for a few months. I'd saved the file with around four guitar tracks hidden in Studio One V3. On 'unhiding' them, three of them will not play. The audio is there and plays quite happily when I tested it in the Pool location, but try as I might I couldn't get it to play in the Track view.
I compared an audio track which does play and the rogue one, and made sure they were exactly the same, but still no joy. I did a bit of digging and found a couple of posts about issues when tracks are bounced, but this wasn't the case with these... they were simply hidden previously and then switched back on in the Track List.
I tried to duplicate the track with all settings, this didn't work. I then created a brand new audio track and dragged one of the files in... again, no joy. The only time I managed to get them working again was to create a brand new Song file (blank) and then drag the individual rogue files into it. When I did this however, the guitar audio then did not match the reference track and vocal track I'd previously put into the new project.
Even though the song tempo itself was 120bpm, the flag to match audio tracks to the project was set, and also the audio clip tempo itself showed 120... the files were still way out of sync with the vocal and ref track. I'm going to try and drop the files into a new project in Sonar before I bin the lot and re-record the guitars tomorrow, but I was just wondering if anyone else has experienced this in S1? I'd appreciate any advice on this please - Cheers - G.