Hey I don't know if you still reply to this still but for some reason the snd_se_narration_characall.nus3bank is not working which is weird it worked before but for some reason it stopped working it gives me this:
Also it tells me its not a Nus3bank file but it is also found out this happens...
Not sure about other models of Pi4 but the Pi 4 B with 8GBs OCed to 2Ghz handles PSP really great except like 1 game I found and it is playable it just looks bad lol Motor Storm Arctic something or other.