A content load or close sets the audio device aside stopped instead of
closing it, and the next init takes it back when it would open the same
one: driver, device, output rate, latency, threading and the thread's
settings. Everything else - ring, arenas, resamplers, mixer - is built
afresh for the new core as before. A device the next init would open
differently, or that nobody takes back, is freed.
The threaded wrapper is kept parked, so its thread reads nothing that
is rebuilt meanwhile. RETROARCH_AUDIO_KEEP=0 in the environment closes
and reopens the device as before.
LibretroAdmin
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