[pawel]

To add: if you author an NTSC DVD audio format has to be LPCM or AC3 (Dolby). MPEG audio aka MP2 is supported by PAL format only. Please take into account that total combined bitrate for both audio and video cannot exceed 9800 kbps. To keep quality audio, i.e. LPCM (1536 kbps) you have to lower max. video bitrate - average at 6500 is well enough for the source you have, higher will only enlarge files but not improve quality, and of course reduce length of the video you can fit into single disc. Use 2 pass for video rendering, if you process avi > mpeg/vob.