You aren't doing anything wrong, but maybe something is wrong with the customs you're using? It could also be something to do with the EU version, which I can't debug myself. Which songs are you trying, specifically?
Hi Maxton, thank you for the fast answer.
In the meantime, I deleted my RB4 installation and went for a fresh one (with EU 2.13 update included, of course), so I can't check the songs I previously converted, but I tried another test on my fresh-installed RB4 choosing 3 songs that should work for sure (I've seen videos of these on YT):
I got the X360 version for all 3 of them, converted with LibForge 0.1.157.0 (with the "Build for SCEE?" option on), and created the 3 pkg files:
(Also, please notice that "CUSA02901" is the proper ID for my EU version, so theoretically everything is OK.)
After that, I installed the 3 pkgs on my PS4 (5.05, Hen 1.8), booted the game, and got the "found some new songs" message: the songs are in the playlist, but again I can't hear any audio in the song previews or while playing the songs.
I think the EU version of the game should work too, at least judging from Rocker's video tutorial, which is using the same "CUSA02901" version I'm using.
I could try installing the fpkg for the US version to test if the problem is related to the EU version, but I haven't seen any fpkg with the US 2.13 update around, so I wouldn't be able to update the game.
Is the 2.13 update really required for the custom songs to work? If so, anyone has the US 2.13 update's fpkg to share?
Again, thank you for your help, much appreciated!
Edited by Zurello, January 2, 2019 - 09:41 AM.