ok...but then does it still makes sense to record in 24 bit. I think your resampling process will drop to 16 bit resolution. Something else, doesn't make sense here - if you have a 1.2GB 24 bit file, it should open as a 1.6GB 32 bit file. (file size * 32/24) This is what happens to the temp files when I open up a 24 bit file in 32 bit with Cool Edit Pro.
At the very least, try setting your temp files to 24 bit.
Wavelab help says:
This pop-up allows you to select a resolution for the temporary files that WaveLab creates when you work. You can choose between 16 bit, 24 bit and 32 bit float files. Some general guidelines:
If you ever plan to export your files in 24 or 32 bit format, use this resolution or a higher one for your temporary files as well.
Even if you only work with 16 bit files, selecting 24 bit for your temporary files can improve audio quality slightly.
For less critical applications where speed and disk space are crucial factors, use 16 bit temporary files.
I have a 1.2 GB file I'm going to try the same thing on with it set to 32 bit. Let's see what it does...