forgot to mention: i'm using Version 0.53a from rpp3po's link.i'm eager to get this running and do some abx tests. this program seems promising. maybe i can debug the playback issue.. although i don't have much java audio coding experience.
I guess the code is build around Java's old sound system: the Java Sound Audio Engine, which doesn't support anything higher than 16 bit. If someone would rewrite the output code to employ the newer (since JDK 1.5) Direct Audio Device mixer with SourceDataLines, the only limits are those of the output device. I could have a look at it, but in my spare free time I'm working on a high quality, multi-platform stream switching library, right now. Improving old legacy code might even deserve higher respect, but writing your own stuff from scratch is certainly more fun...
guessingField.setBackground(p<=0.01?new Color(0,255,144):(p<=0.05?new Color(255,255,80):new Color(255,88,64)));
guessingField.setBackground(p<=0.01?(new Color(0,232,192)):(p<=0.05?(new Color(255,248,0)):(new Color(255,80,32))));