This catalogue is designed to set out the basic information about every piece of music, published or unpublished, which Luigi Dallapiccola is known to have written, arranged or edited. The order is chronological, and date of completion, rather than commencement, is the determining factor.

Rudy Shackleford has pointed out that in my (English) monograph Luigi Dallapiccola, published in 1957, I gave two different forms of the series on which Luigi Dallapiccola's Quaderno Musicale di Annalibera is based: a first, ‘erroneous’ form (quoted in Shackleford's Example Ia), and a second one, included in the ‘arc of melody’ in piece No. 6 of the Quaderno, ‘Fregi’. This second form, quoted in Shackelford's Ex. No. Ib (which is obviously the ‘right’ one) differs from the first in the placing of two notes — G and A. Shackleford's remark requires some clarification, not so much for personal reasons as for its bearing on the very nature of the 12-note method and serial writing.