Thanks Jim. I, too, have used that feature successfully. The problem I really have is in acidizing a non-acid loop and getting RealBand to recognise those features you mention - tempo and chord root. I have gone around the houses several times with this and here is the issue I face:

1. When I use the 'acidize this WAV file' in RealBand I set the tempo and chord root of the loop. Now when I try to import this 'acidized' loop on to a track in RealBand the chord root and tempo are not listed on the form so I have to enter these again. That means I really have to save the file to include these parameters because when I use these in the future I will have to re-assess what these are.
2. I used Sonar X3 in Clip Construction View to create a Sonar Groove Clip. Amazingly this works ... sometimes. What I mean there is that sometimes when I use my Sonar Groove Clip in RealBand the form will sometimes contain the root chord and tempo and other times not.
3. Pipeline from this forum helpfully mentioned ACID Express 7.0 and I downloaded this. At last I was able to at least see that ALL the clips that I had acidized in RealBand and Sonar WERE really ACIDized. I was also able to to ACIDize a loop with ACID Express and confirm that it was ACIDized and this loop would sometimes populate the RealBand form and other times not.

So, the bottom line for me is that RealBand, Sonar and ACID Express do all consistently ACIDize the target loop but the reporting of this in RealBand is distinctly inconsistent.
I am going to examine the ACIDized WAV data for these to see if there is something that stands out. I am just thinking at the moment, as I write this post, that perhaps it may not be reported by RealBand if it doesn't actually agree that the loop conforms to the stated chord root or original tempo (but that's desperation talking - lol)

Thanks Jim