You can try MultitrackStudio Lite for free. Its main limitation is that it can't handle more than 3 tracks.
Windows 10, 8, 7, Vista, XP
Installation: Doubleclick the MultitrackStudio-Lite-Windows.exe file and follow the instructions that appear on the screen.
macOS 11...OS X 10.9
Installation: Open the MultitrackStudio-Lite-Mac.zip file and drag MultitrackStudio to the Applications folder.