Thank you, Sherry, for the reply. My setup was (and is) Composer with Loopbe1 midi cable, Asio4all, and Aria+GPO4 sounds. After studying the tutorials you provided, and several new attempts today I can get it work - but when I change to another piece of music (ending Aria player, then open a new file in Composer, and restart Aria) the Aria player often "hangs" in a sound after a few bars, the Loopbe1 turns on it's mute - and I have to end all programs. I have of course checked that midi IN and OUT was not active in Composer.

Anyone have any ideas about from what/where this is caused?

I still consider buying Composer ... am impressed by it's possibilities for controlling varoius parameters ...

Thanks!
Ole