Nandub question

[Ham]

Just a quick question. When I use the built-in bitrate calculator to calculate the bitrate, what number should I put into the audio setting, or should I just select the get audio from data option? I'm trying to shrink an avi file with nandub so it can fit on a 700Mb CD-R.

[UncasMS]

any bitrate you like

if you want to keep the former one, fine
in case you want to reduce the bitrate before or after muxing, use the desired bitrate in nandub