we set signal in parseNextEvent on dataInc events, which then effectively triggered 2 cues through kDoSoundUpdateCues instead of one. Fixes Freddy Pharkas Ballad intro on floppy + demos
it seems that sound system up till SCI0_LATE uses int16, afterwards it seems they changed to byte
main music object (conMusic) in Laura Bow 1 uses -1 as priority. This was truncated to 255 till now, which resulted in many sound effects not getting played, because those used priority 0