Over the years, he has written fantastic articles (some long, some short) in Sacred Music and other places, and together they amount to what is really a manifesto: The Musical Shape of the Liturgy. It could be about 450 pages (my current estimate). It is a very complex typesetting job, with page after page of musical and manuscript examples. It is going to be very expensive in money and time. However, it is worth it. We need this book. Yes, the articles are available here and there, but the book is the key.
We are moving fast on this and hope to have it out in January or thereabouts. Just so that we are clear: Mahrt is a musicologist with an international reputation. But he is also more than a scholar; he is a practitioner and advocate. He gives voice to what many of us can only intuit, and brings an intellectual weight to the cause that is unmatched. This book will make a critical difference going forward, entrenching the accomplishments so far and preparing the way for a bright future for Catholic music.
If you can help, please consider a contribution. There are two ways. There is the traditional way using the widget below (your contribution is tax deductible). There is also another way: help with extracting texts from PDF scans. This is technical work and a bit tricky but it is essential. If you are interesting in doing this, see this thread on the MusicaSacra.com forum.
Here is the full Table of Contents.