Setting the `info.format` explicitly actually helped!
The game's running now and plays sound. I still get a lot of underrun messages from the ALSA lib though.
And some audio files seem to be different:
Loading audiodata: audio/vo/0-P2.ogg; frames: 252287, channels: 2; sampleCount= 504574 numread 252224; frames 252287 Loading audiodata: audio/vo/0-A2.ogg; frames: 212479, channels: 2; sampleCount= 424958 numread 212416; frames 212479