This work addresses the historical confusion regarding the original scoring of Joseph Haydn's 1798 Missa in Angustiis and provides a definitive, versatile performing edition. Denis McCaldin, a noted musicologist, utilizes his expertise in classical choral repertoire to reconcile the discrepancies between Haydn's initial composition and subsequent versions that incorporated additional wind instruments. The text serves as a scholarly guide for conductors and performers, offering a standardized framework for modern interpretation.

Experts and conductors frequently cite this edition as a standard resource for resolving instrumentation ambiguities in Haydn's choral works. The text is recognized for its practical utility in both academic study and professional performance settings.