The IdolM@ster Shiny Festa: Funky Note - JP - NPJH50676

[Kimidori]

After playing a few songs with Kimidori's music player I noticed that audio and video are out of sync. The audio is in sync with a pre-decoded video running @ 30 fps, but JPCSP plays the video at ~28 fps. No idea if this is an performance issue. The game constantly runs @ 28 fps (videos) or 30 fps (menus); Vsync is disabled and frame skipping doesn't have any effect.

yeah, and it feel quite annoying, I reported this problem in my 2nd post in this thread

1. The video play slightly slower than it real speed (even when not recording) so the dance become more and more desync with the song.

and it not only happen with shiny festa either, every namco game I play have this video-audio off-sync problem (for example: Bakemonogatari portable and Madoka portable). not sure if this happen with game from other company too.