The lossless codecs I found so far are wavpack and optimfrog, think I read something about tta but I'm not sure on that.
I know that optimfrog takes longer to compress, so I guess it is also more cpu-intens. True?

The purpose is to compress audio during recording, so it is less stress on the harddisk.
It is currently realised via wavpack and it works well, I'm just curious if there are alternatives to wv.
The app is the crossplattform daw traverso: http://traverso-daw.org/

regards
Philipp

Better use WavPack.

Wavpack is already in use, I'm looking for a second option.
TAK can't handle 32bit float, can it?

See this one esp. the 4th chart
http://squeezechart.freehost.ag/audio.html
(for 32-bit float compression)
and this
http://www.synthetic-soul.co.uk/comparison/lossless/
(for encoding and decoding speed, and 16-bit compression).

that's a new one, btw the legend is here: http://squeezechart.freehost.ag/explain.html

and check this out http://squeezechart.freehost.ag/People.html

Oops, somebody credited the wrong guy