I’m remixing a recording I did a couple of days ago. The mix has 25 tracks, vocals, piano, drums and wind instruments. I just ran noise reduction and compression on all the tracks and my project file is 47GB.. Every time I run any effect it pins drive C at 100% and the computer is non responsive for 2 to 3 minutes . I’ve got a Ryzen 9 processor with 64GB memory so horsepower and space are not the problem.. How can I fix this..
Audacity uses uncompressed 32-bit floating point which takes-up twice the space of 16-bit audio and then it saves copies/undo information so projects can get HUGE!
For multitrack mixing you might want to consider a DAW. They are designed for multitrack recording and mixing and they generally save your original files/tracks as “resources” that aren’t directly altered. “Undo” isn’t handled the same way and the project mostly just contains the “instructions and adjustments” so it doesn’t “grow” too much.
Running NR and then compression will (temporarily) quadruple the project file size in order to store the undo information. Save the project then quit Audacity - it should discard the undo information.