metadata.set(XMPDM.TRACK_NUMBER, trackNum.getA());
//metadata.set(XMPDM.NUMBER_OF_TRACKS, trackNum.getB()); // TODO
}
// Disc number
AppleDiskNumberBox discNum = getOrNull(apple, AppleDiskNumberBox.class);
if (discNum != null) {
metadata.set(XMPDM.DISC_NUMBER, discNum.getA());
}
// Compilation
AppleCompilationBox compilation = getOrNull(apple, AppleCompilationBox.class);
if (compilation != null) {