You can try MultitrackStudio Lite for free. Its main limitation is that it can't handle more than 3 tracks.
32-bit Windows version
Windows 10, 8, 7, Vista, XP
64-bit Windows version
x64 Windows 10, 8, 7, Vista
Installation: Doubleclick the MultitrackStudio-Lite-WIN64.exe or MultitrackStudio-Lite-WIN32.exe file and follow the instructions that appear on the screen. Hint: use the 32-bit version if in doubt.
macOS 10.15...OS X 10.9
Installation: Open the MultitrackStudio-Lite-Mac.zip file and drag MultitrackStudio to the Applications folder.