New versions of Horny (OS 4 native MIDI-sequencer) by Inutilis Software and Audio Evolution 4 (OS 4 native audio-sequencer) by Davy Wentzler have been released. Both are supporting the eXtream Sync library for synchronizing now, so MIDI and audio can be used for the same project. Pressing "play" in one application will start both at the identical position (same for all other transport functions, of course).
Original :
http://amigaworld.net/modules/news/article.php?storyid=2486