I too use the SOL by Hector on my home 527. I find some of them have that extra vibrato or something added as you hold the note. But they do add a lot if you keep the volume reasonable and combine them with the appropriate matching organ registrations. Also I found that when using them on the 527 (and other organs for that matter) you need to be sure the keyboards are not velocity sensitive. Nothing quite like a Dulzian that is velocity sensitive. The 527 ships with velocity sensitivity on. Maybe the 557 and 577 do also but I cannot recall. Jim Hockin, Rodgers Organ Studio of Minneapolis ----------------------- Buy music, save a frog. ----------------------- To unsubscribe or change mail delivery (digest, vacation) go to www.frogmusic.com/rodgersmem.html