While comparing two versions of Franck\u2019s Offertory in Eb Major I noticed that there are some differences in the score .... here and there they have naturalized the odd note here and plus other variations.\n\nIs that normal? I suppose they modify as to difficulty or based on level of competency? .... \nThanks again!\n\nRobert\n\nFind more organ playing advice at http://www.organduo.lt