I am assuming its ok to play a loop on two tracks?

[alphamach]

So an ultrasonic and a trickling stream?

Im sure it is but just thought to check?

[Shannon]

If you're using the same title, sure. It gets more complicated if you want to use two or more titles together in loop. But all two or three tracks of a given title all have the same script, so they're doing the same thing. Generally it's more efficient to just pick the format you prefer and use it by itself though.