TC-Helicon VoicePrismPlus Manual - Manual (Page 35)

Dithering is relevant only on digital outputs and it is always
the receiving device that determines the number of bits you
must dither to. A DAT or CDR recorder should normally be
dithered to 16 bit.
% 35 %
VoicePrism Plus User Manual Appendix D: About Digital I/O