Hi,
the event will be called with every new pano,
to play it only once with remove the event after the first call or use the krpano onstart event to play the sound,
e.g.
<events name="currentpano" keep="true" onnewpano="playsound(bgsnd, '1.mp3|1.wav', 0); set(events[currentpano].onnewpano,null);" />
or simply:
<krpano onstart="...; playsound(...);">
...
Best regards,
Klaus