Yeah, the linker has it’s own search path, and it is fed by -L as linker flag. You can see it in the linker call e.g. -L/Users/djatwar/Development/JUCE/ScratchEZ/scratchGameCPP/Builds/MacOSX/build/Debug
Option 1: quick and dirty copy the lib there (bad idea, because no manual steps should be necessary in the build folder, but works)
Option 2: add the path to the libVinylTrack.a file with -L in Extra linker flags. You can add any number of paths using -L for each folder
It is a bit tricky though to get the relative paths right, that’s why I use something like -L${PROJECT_DIR}/../SDK. If you use simply relative paths, I think it is relative to the xcodeproj file IIRC.
I just notice you use round brackets for PROJECT_DIR, I think there should be curly brackets.
Good luck