I’ve been using Audacity with Ventura 13.0.1. I’d like to use the same project files with Audacity with High Sierra (10.13?), and also Windows. Possible?
It depends on the Audacity version, not the operating system.
Any version of Audacity above 3.0.0 will open an AUP3 file. Some features (such as non-destructive trimming of clips) will require a more recent version. Best advice - use the same version of Audacity on all platforms. I’d test on High Sierra first - there have been reports that Audacity 3.2.3 has problems there.
– Bill