Hello again :-) Today I am looking for a very short and simple method to play sound files. The sounds itself are small and will play for something like a second only. It would be important that the sounds are called via file name and that they willl be played in background when started, so that the rest of the program goes on working. On the Atari I used the XBIOS commands of the OS for that. The sound routine should be as short as possible. Thanks! Markus, looking curious