In the last volume of the New Josquin Edition, the editors have published as an appendix some works that had not been considered before. The majority of the following titles are short quotations from Josquin works in Lodovico Zacconi’s music-theoretical work Prattica di musica utile et necessaria si al compositore per comporre i canti suoi regolatamente, si anco al cantore (Venice: G. Polo, 1592). Zacconi references numerous other works by Josquin in his work, but these could be clearly assigned to surviving works. The following excerpts refer mainly to works of which no other sources have survived. Accordingly, it is also difficult to judge authenticity on the basis of a short excerpt.

No.	Title	Voices	ID	Authenticity (NJE)
1	Missa Inviolata	?	NJE_App._01
2	Missa Mi mi	4	NJE_App._02
3	Castigans castigavit me dominus	?	NJE_App._03
4	Celi enarrant gloriam dei	?	NJE_App._04
5	Descendi in ortum meum	?	NJE_App._05
6	Exultent et letentur	?	NJE_App._06
7	In deficiendo ex me	?	NJE_App._07
8	Omnes gentes	?	NJE_App._08
9	Scriptum est enim	?	NJE_App._09
10	Seculum nostrum	?	NJE_App._10
11	Il n’est plaisir	3	NJE_App._11
12	Si bibero crathere pleno	?	NJE_App._12
13	Textless piece	?	NJE_App._13