William Mahrt on working towards a revision
Prof. Mahrt's essay here. An excellent read. Hat tip to Jeffrey Tucker of The New Liturgical Movement.
SIDE NOTE: An out-of-state visitor approached me after 10:30 Mass a couple of weeks ago and actually thanked me for "programming actual real Catholic music". True story. Most of the choir was still around after Mass to hear him say this. I knew what he was getting at, and I gave him a big thank you (I didn't bother asking any questions - Baptisms were following soon, and I still had to pack up for the day and lock the choir room closets).