When using a gstreamer app with esdsink, and setting the pipeline to
PAUSED, other esd using apps are blocked.

(This is not about the fact that the sink doesn't release the dsp, but that
it does something that stops other apps to actually use the sound server
while esdsink is paused.)

This can be reproduced by running two instances of some app that doesn't
set the sink state to NULL on pause (like jamboree), playing with both of
them and then pause one of them => the other one is blocked.