following the guide posted at
http://www.geocities.com/xesdeeni2001/StandardsConversion/
i have started the conversion process. but the guide
(section VI. PAL (Video) DVD (25i Fps) -> NTSC DVD (29.97i Fps))

doesnt say anything about the audio conversion.... its just says

"At this point your audio and video files are ready to be authored and burned to a DVD. Various methods exist for this, which are beyond the scope of this Standards Conversion document"

does the audio need converting also... or is it set?