Howdy Mark,

I use either Audacity (free) or Creative Wave Studio (came with my soundcard) to record the performance from Composer. I use this method because I use soundfonts a lot for getting a good sound. If I'm using Garritan Personal Orchestra, I will either use their built-in record function, or I'll still use Audacity or Creative Wave Studio, just depending on what else I've been doing and am set up for.
I suppose this is a method of conversion

ttfn,
Sherry