These most fascinating pieces of Jehan Alain have been composed until 1940, originally as an orchestral work. It's been lost during the turmoil of war. Fortunately Alain has sent the organ version from his military service to Noelie Perront, an organist which had played pieces of Bach and Alain on the radio. The Trois Danses often are considered als Alain's masterpiece.
Because of the huge acoustic range I had to reduce the main volume a little bit to avoid overdrives in the mp3. So maybe wind up your speakers and enjoy!