can this be done losslessly?

if not, how about 24/96 -> 16/96?

thanks

er...by strict definition, if you go from higher to lower SR/wordlength, it's 'lossy'...however, there's a good chance it won't be AUDIBLY lossy at the specified rates, at normal listening levels, if you do it with good converters and dither.

thanks. is foobar (with builtin pphs resampler) considered "good converters"? I used foobar to convert 24/96 to 16/48 OGG... wonder if i have done anything wrong?

As you post in the FLAC forum I suppose that you convert from (lossless) FLAC to ogg (Vorbis).
First of all, most lossy codecs, including ogg (Vorbis), accept larger bitdepths than 16. So you can leave the bitdepth at 24bit.
As for the sample rate, PPHS does the job OK, in theory SOX might be "better" but slower (there is a resampler plugin based on SOX) and there also used to be a SRC plugin for foobar that was more or less withdrawn by the author.

The "best" way is to resample from 96/24 to 48/32 and then encode to OGG (with oggenc2.exe).