Since I have a couple of Audacity versions installed (portable) I occasionally I trip over an older aup3 project which asks me to convert the project when opened with a later version - which I usually don’t want to do.
Before I start doing my own tests in detail: Is there a list at which versions exactly such a compatibility break happens? So far I found one oddity: 3.4.2 can open a 3.6.0 project, but not a project created with 3.6.4 (fails to load avformat-60.dll). I found no (obvious) hint about this being intentional in the changelog on github.
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Not that I’m aware of.
What we do know:
- Audacity version 2.x is broadly compatible across the entire range.
- Audacity 3.0 can open projects made in Audacity 2.x, but can only save in Audacity 3 (“.aup3”) format.
At some point after 3.0 checks were added to Audacity to restrict which version of Audacity is required to open a project. If you are able to figure out exactly what these restrictions are, I’m sure it will be useful for others to post your findings here because I don’t think it’s documented.
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