Hello. In the case anyone interested, full PellesC source code of this tiny demo. Play the xm tune in the resource.

very cool stuff

I tried running this in a VM and on start-up, I get error "cannot init miniFmod engine" (which is expected because the VM has no sound output). After clicking OK on the error message box, a black window opens but shows nothing (todo negro).

When running on a machine with sound, I see a cube composed of a lattice of 5-by-5-by-5 grey spheres.

> I see a cube composed of a lattice of 5-by-5-by-5 grey spheres
Yes, it is what it should show

> After clicking OK on the error message box, a black window opens but shows nothing (todo negro).
minifmod came with PellesC package. It works well nearly all the time, enough for my purposes. I have seen that if I try to release the fmusic song I get an error message when I close the window, so I let Windows do the job.

Thank you for testing