Max size wav files

What is the max size wav file the BB can use for a sample? I am thinking about putting together a kit that uses Ambient pad sounds for texture. These are used frequently in Worship music, and right now I trigger one that just plays in a set key throughout the whole song to create some ambience. In that use the files are pretty big because they are Wav files that are 7 minutes long. Can someone let me know the limits as far as file size and time length?

Thanks, Michael

I was told it is 3.4mb when I asked this question a couple weeks ago.

Thanks. Well that ain’t gonna work for me since it only wants to see wavs which are much larger in size compared to mp3 or other compressed formats.