html5 export does not work on safari, something with the sound

:information_source: Attention Topic was automatically imported from the old Question2Answer platform.
:bust_in_silhouette: Asked By ictbram
:warning: Old Version Published before Godot 3 was released.

I’ve created a musical notes helper application with Godot 2.1. It’s almost finished. The html5 export works on firefox, chrome, edge, but not on safari. (not on desktop, not on ipad)
It has something to do wit the sound. I’ve used SamplePlayer2D with 12 wave files in it.
The console output on safari gives
typeError: _as_audioctx.createStereoPanner is not a function. (In '_as_audioctx.createStereoPanner()', '_as_audioctx.createStereoPanner' is undefined)

I’ve put an html5 export with debugging enabled at http://ictbram.com/musical-notes-helper-debug/
a test on safari desktop gives:
EXCEPTION:
ERROR: At: core/rid.h:143:get() - Condition ’ !elem ’ is true. returned: 0L
ERROR: At: servers/spatial_sound_2d/spatial_sound_2d_server_sw.cpp:345:source_set_transform() - Condition ’ !source ’ is true.

Maybe someone knows a way around this or can can give me a hint for a possible solution?
Thanks.