Only Transcode Higher Rated Music

[AnnieBody]

Hi
I am just trying some options for high level music playback.
My Cambridge Audio 851N streamer supports up to wav24 and dsd64, but I have some files with much higher rates. It currently plays all music without having a need to use a 'stream.transcoding' option.
Now, I know I can recode the music to play back on the 851N but I am working on a Raspberry Pi replacement of my Squeezebox and while doing so want to have the highest music coding for future proofing, and would like to compare the results.
Is there a way to set the transcoding for wav32 to wav24 without affecting other wav rates?
Is there a way to set the transcoding for DSD128, 256 and 1024 to preferably play as DSD64, or another format?
Regards