Octave Altering couplers make the stop play higher or lower than originally intended. They are named by their pitch level and division = SW 4' The voicing of organs with 4' couplers often varies from the voicing used with organs without 4' couplers. A straight organ, that is, one that only plays its stops at the pitches they were intended to play can become quite bright and sparkly at the top range of the keyboard. An organ that has 4' couplers may be voiced differently since when 4' couplers are engaged the top octave moves down an octave and a new, unheard as yet, top octave appears. The octave that moves down is now within normal playing range. If it is voiced firm and bright to be the top octave and now is moved down, it may well be obtrusive and over-bearing in it's new location. For this reason, it is often voiced a bit more conservatively in an organ with octave altering couplers so when the couplers are brought into play the instrument does not begin to scream! Screaming Mixtures and Screaming Mimis are no fun to be around. -- noel jones, aago athens, tennessee, usa 423 887-7594 ------------------------------- frog music press, publishing MIDI music moderator, rodgers organ users group at www.frogmusic.com ============================================================================= New low pricing on books and music for the Rodgers Organ at www.frogmusic.com ============================================================================= To unsubscribe or change mail delivery (digest, vacation) go to www.frogmusic.com/rodgersmem.html