I tried a few methods, but none made a functioning DVDA (in Pioneer Elite DVD-59AVi) until this
http://rdhsoftware.blogspot.com/p/dvda-gui.html
It is a front end for a few other open source software.
It seems to have trouble with files of different sample rates. But not those sample rates itself. For example, mixing an 88Khz and a 96Khz file - no go. But each works separately.
