Here's a sample of my first try at this program in creating a 5.1 from stereo. The track is "Have Mercy On the Criminal" from Elton John's "Don't Shoot Me I'm Only the Piano Player", an album that we should have had on SACD but were denied by Universal for some bizarre reason.
Anyway, here's a sample, less than a minute so it should be OK. If they complain I will remove the link but I doubt they'd even care. The purpose of this sample is to show what this program can do, not to pass around a minute of Elton
It's only 10Mb, 16/45 5.1 flac
https://mega.nz/file/yQIAUS6K#UDP4R3zrhgTktroWjCOg7p-k3eu8ftAOEzCJk_-ANv8