Choralia provides two editions of training aids for Victimae paschali laudes by O. De Lassus, so as to best match the score edition used by the choir. Edition 1 is based on the edition Sämtliche Werke (Neue Reihe) vol. 23 - BA 4283a published by Bärenreiter, while Edition 2 is based on CPDL edition #020076. The following differences exist between the two editions:

Edition 2 is transposed a fourth higher with respect to Edition 1.

Bass, bar 5 of "Credendum est" in Edition 1 and bar 59 in Edition 2: the last note (syllable "Ma") is one tone lower in Edition 1 with respect to Edition 2 (after having considered the overall transposition).