AVA216: How to master the rhythm of 3 against 2s in the In Dulci Jubilo, BWV 608? by Secrets of Organ Playing published on 2012-01-20T22:06:27Z Denham writes: Please can you do a masterclass on the In Dulci Jubilo in the same Orgelbuchlein Book. BWV 608. How to master the rhythm of 3 against 2s. It is so difficult.