Posted November 29, 2017
I can confirm that those are available to 64-bit Mint 18.3... just do the following to find them: Open Synaptic, click the "Architecture" button in the lower left corner, then select "All" (or arch: i386) in the panel at the left of the window. Next, use the quick filter to find the package you need.
artistgog: The dependencies Sphinx needs are libsdl2-2.0-0:i386, libopenal1:i386, libudev1:i386 + dependencies
You can also use the terminal: sudo apt-get install libsdl2-2.0-0:i386 libopenal1:i386 libudev1:i386