Jeff Evans
If you import files from outside Studio One you do not have to stretch them manually at all. They do not need any special tempo info embedded in them either. All you have to do is simply figure out what the tempo is of any external imported files (which you may know anyway) and simply let Studio One know that info. The moment you do that the files stretch to the session tempo and to any other tempo changes as required. When you import a file that does not have any tempo info in it when you look at that track and its inspector you will see the words 'Not Set' in the tempo window. That is where you add the tempo info and once you do that it will respond immediately.
Jeff, I tried to do this with a project again, and it didn't work. I did the "type tempo for 'Not Set'" box and all that. The file could stretch to the
current tempo, but if I changed tempo, nothing happened. I had shown this to someone at PreSonuSphere when I was doing a seminar there on signal processing, and he confirmed that it didn't work but he didn't know why.
HOWEVER! I found out what the problem was. When you create a song, on the very first screen you must check "Stretch Audio Files to Song Tempo." I created a test project with that checked, and everything worked as you described. I created another test project without that checked, and had the issues detailed above.
The problem occurred for me because the setting for that check box persists from song to song. I had turned it off a long time ago for a couple specific songs where I didn't want to stretch tempo, and missed turning it back on again.
With that mystery solved, I then I thought I'd compare quality. I did a stretch from 84 to 95 BPM in PS1, another in Sound Forge 10, and then Sonar. The sound quality in Sound Forge and PS1 was very good (I couldn't tell any difference between the two), even in real time, although doing offline rendering in Sonar did produce better results. The main difference was less frequency response alteration (wasn't expecting that) and the timing accuracy seemed better.
In the process of comparing, though, I discovered something
EXTREMELY cool. I put the two tracks side by side and used exclusive solo to switch between them. But when I played them both together, there was an amazing swirling sound caused by the differences in the algorithms. It's sort of like flanging, but more out of control. I can hardly wait to use this on drums!!!! It's one of the first "new" effects I've heard in years and it rocks. Try it!