Decoding of mono AT3+ using SonicStage

[utena000]

Are the ADX files really sent to himdrender?
I see 2 possibilities:
- the game is decoding the ADX format in software, without using sceAtrac3plus.
- the game is converting the ADX format into RIFF/WAVE format. sceAtrac3plus is only accepting this format, otherwise, the following error is produced: "Not a RIFF/WAVE format! XXXXXXXX XXXXXXXX"

My guess is the first alternative.
I've never found info that the PSP can handle the ADX format natively. Or am I wrong?

No, you're right. The .ADX files are normally decoded internally by the "CRI ADX" threads on those games and the result is generally a regular ADPCM output. That's why some games use these files and can still output sound.

And this mono AT3+ can't be played by SonicStage. This is why I'm trying to find out if this is a restriction of SonicStage (which I doubt) or if the generated OMA file is incorrect (mono AT3+ might have a slightly different header).

Unfortunately, it is a restriction of SonicStage (check this thread: http://forums.sonyinsider.com/topic/9585...ith-hi-md/ ). Turns out, Sony assumed no one would generate ATRAC3+ media in MONO mode. Makes sense, but their at3tool allows devs to still do this, so, quite a contradiction here...
Anyway, looks like the only way to have SonicStage playing this, is to render these files as stereo data.

this makes sense, but is it possible to change the mono sound files into stereo data, hope there will be a good news later~
then the emu will become more and more perfect