Hi again Noel. OK it made no difference to the longer song rendering. It still cut out way before the end. However, I should have told you before, that the wave pattern is still visible even when the sound has cut out.
As an experiment I changed the rendering from .aif files to .wav file and so far it has worked. Of course it takes up more space but I can live with that.
Just another question please. Do you know anything about, or have you used, Garritan software. I know it sounds pretty good but have also been told it is not that compatible with Logic X which is what I use.
Any ideas?

Ian