Hanaoni : Yume no Tsuzuki Audio Issues

[Iceforge]

The game itself plays fine without any serious issue whatsoever except videos which plays only audio with no video, and every sound and voice in the game just plays back a corrupted clicking sound, while BGM is silent.
The latter is the most graving issue, considering reading a VN without audio kinda defeat the purpouse of the format.
Anyone care to lend a hand ?

This is an expansion disk to another game, Hanaoni : Koisomeru Koku Eikyuu no Shirushi, which while it had the same issue with video, played every sound perfectly without issues.
The only difference between the two is the firmware, the original is 6.35, while this one is 6.60.

[Iceforge]

Out of curiosity I've took a look at both games' files on disk and I've noticed the audio format used between the two must've changed.
In the first one there are libraries for atrac3+, and lbmp3-4 and others stored in the SYSDIR directory, those are absent in the second one, instead there are two files libpsmfplayer.prx and psmf.prx in the URSDIR/MODULE directory.