Hello, all. I've been meaning to ask this question: when exporting, right after the "fast bounce" checkbox, there is a checkbox for the 64 bit engine. Does this need to be checked when exporting to MP3 or WAV? Thanks. SLB _________________________________________________________________ Bing brings you health info from trusted sources. http://www.bing.com/search?q=pet+allergy&form=MHEINA&publ=WLHMTAG&crea=TXT_MHEINA_Health_Health_PetAllergy_1x1