Now I know that the audio used on my laserdisc transfer was already pitch-corrected to account for the PAL speedup. That is, even though the audio played at PAL speed, it played at the original - correct - pitch. (I don't know for certain if this is also the case with the 2004 DVD, but I should carry out a quick side-by-side listen to find out).
Anyway, if this audio is resampled down to play at NTSC speed, it will need to be pitch shifted up in order to retain the correct pitch (time stretching).
Alternatively, you could use DGPulldown's 25fps to 29.97fps conversion and leave the audio untouched (which I believe was the method boon used for RtJ).