This might not be very urgent as you can just, don’t stop the sound before disposing it, but thought it was good to report never the less.
The exception that you get is
InvalidStateError: The object is in an invalid state and here is a playground with the repro link. This exception is thrown (only in Safari) if you call stop() twice on an AudioBufferSourceNode. The reason why this might be called twice is because the property
this.isPlaying is updated asynchronously after the first stop, and a dispose will try to stop the sound again.
I don’t think this is urgent and feel free to close it but I just wanted to point this out as Safari is not the most common browser and this might lead to other types of bugs if you are not expecting a throw when disposing a sound.