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+# Kickstart
+
+As an application developer, when you play audio, you have to use a device URI.
+Instead of using the default one, guessing one by listing them or even
+hardcoding it, you should call **ahl-4a/[role]** with **open** as action.
+
+The role to open should be defined in a configuration file or hardcoded. If you
+hardcode it, please consider to at least define it at one known place so that it
+can be easily changed.
+
+As opening a role may fail, you should test if it returns a success and a device
+URI. Both of them should be tested because it's perfectly fine to have a role
+without a device URI from 4a point of view (no device is bound to the role thus
+no audio can be played in this case).
+
+Once you have finished to play audio, you should call **ahl-4a/[role]** with
+**close** as action. This is important to allow other applications to use the
+role when you are not using it.
+
+You may also want to handle events of the window manager to know if you
+application is displayed or not, and open/close accordingly the role you are
+using.