There is a menu which has 5 of the audio options. The sound only track is available by your audio button on your DVD remote only.

I grew up with a UK TV early 80s recording which became a huge part of the source for the Monomix restoration project. This is my favourite.

Second favourite is the other 1977 Theatrical Stereo mix as that was my first retail copy.

The link in Post 38 tells you the differences and as you will see, the Monomix has quite a few differences.

Back to the arguments post earlier, Threepio's tractor beam line, opening/closing blast doors and who was annoying Luke on the "Blast it" line have caused some fun and games around here in the dim and distant past...... Happy days!!