I agree with Papai2013. I’d personally leave the audio, like the video, as-is, in the original Dolby Surround format. As far as proper playback at home, Dolby Pro Logic was “designed to decode soundtracks encoded with Dolby Surround” (credit: Wikipedia) and it goes back to the days of VHS and Beta, so it shouldn’t be an issue. (Dolby later improved upon that with Pro Logic II, IIz, and IIx.) New receivers like mine have an even better way of playing these signals based on Dolby Atmos and DTS: X. You might want to double check any audio concerns with Hairy Hen, as he is the best when it comes to these sorts of issues, but I believe a straight lossless stereo encode will do the trick nicely. Hope this helps! 😃