Fixes to SDL audio renderer and autodetection support

app/gui/SettingsView.qml

@@ -386,14 +386,10 @@ ScrollView {
                     textRole: "text"
                     model: ListModel {
                         id: audioListModel
-                        // Detection of audio channels only works on Windows
-                        // and even so, it's still unreliable because audio devices
-                        // lie about how many channels they can support. Hide the
-                        // option to autodetect until this is resolved.
-                        /*ListElement {
+                        ListElement {
                             text: "Autodetect"
                             val: StreamingPreferences.AC_AUTO
-                        }*/
+                        }
                         ListElement {
                             text: "Stereo"
                             val: StreamingPreferences.AC_FORCE_STEREO