@oldears Just download DVD Audio Extractor https://www.dvdae.com/download it's free for 30 days and $38.50 thereafter. It rips Blu-Ray Audio too.
You only need a computer DVD/Blu-Ray drive to rip, an Oppo is only required for SACD ripping.
Most of my DVD-A's are stereo and multi channel but there are are few that aren't, however my Aurender plays those multichannel discs in stereo without a problem.
Have a play around and see how you get on.