dubdisciple
If i had to guess, you would likely lose a court case of this in the US. On the other hand that case is not likely to come. If you attempted this with an active product like Ableton live there would be a better chance to actually test the legality. In this forum you will get positive encouragement becsuse this forum has a history of leaning towards legal loopholes if it benefits them. Not a critiscism but an observation based on several precedents. I highly doubt Gibson cares if someone allows sonar files to be read by anoyjer product since they have bigger financial concerns that would not be even partially fixed via litigation over this.
The end user owns the content that they have created with a software product. It is a separate issue from the software license agreement. I don't think anybody would disagree with this statement.
Having ongoing access to that content should not be considered a loophole, but rather a right of ownership!
Nothing that I have seen discussed in this thread, and others, seems to imply in any way that recovering one's creative works from a proprietary file format infringes on any copyrights or patents of the software application owner.
I use LibreOffice rather than Microsoft Office, and it can open MS Word and Excel files. Sometimes not perfect, but it is nice to know that if Microsoft went out of business tomorrow, I could still read my files...