Look at the recent thread on how to rip DVD audio.
I use DVD Audio Extractor to read DVD-Audio discs from my standard DVD player on my laptop. I just extract the hi rez 2 channel tracks, but it has an option to read multichannel and output 2 channel. It has a free 30 day trial.
I do not know of any program to do this with SACD.
J River Media Center handles multichannel files and can downmix them, although I do have not done this. I stick with just the 2 channel files. Again, there is a free 30 day trial.
I use DVD Audio Extractor to read DVD-Audio discs from my standard DVD player on my laptop. I just extract the hi rez 2 channel tracks, but it has an option to read multichannel and output 2 channel. It has a free 30 day trial.
I do not know of any program to do this with SACD.
J River Media Center handles multichannel files and can downmix them, although I do have not done this. I stick with just the 2 channel files. Again, there is a free 30 day trial.