-PCM to try, and _plughw_ as the second (and last). This illustrates
-ain imagined setup with a bluetooth device _bt_ that should have
-priority when in use. *alsa-dispatcher.lsp* will direct playback to
-_bt_ if it is in use and otherwise fall back on _plughw_ (i.e. the
-default sound card).
+PCM to try, then the _usb_ device and the _plughw_ as the third and
+last option. It's an imagined setup with a bluetooth device _bt_ that
+should have priority when in use, next a USB sound card _usb_ as
+secondary option when in use, and thirdly the default sound card
+_plughw_.
+
+Thus, *alsa-dispatcher.lsp* will try to direct playback to _bt_ first.
+If that is not in use *alsa-dispatcher.lsp* tries to direct playback
+to _usb_ and if the is not in use either, then *alsa-dispatcher.lsp*
+directs playback to _plughw_ (i.e. the default sound card).
+
+== NOTES
+
+*alsa-dispatcher.lsp* keeps playback channeling to a selected endpoint
+as long as that is available. If the endpoint goes away, or the
+*alsa-dispatcher.lsp* program is killed, that channeling is
+interrupted. Then the original sound source (eg a browser) may
+establish a new playback sink, which would caue a new
+*alsa-dispatcher.lsp* to run through the priority list again to pick
+the first option available in the then current audio context.