         }
         // Start the engine.
         do {
-            self.engine.prepare()
+            engine.prepare()
 
             #if os(iOS)
 


            #endif

            try self.engine.start()
            shouldBeRunning = true

        } catch {

    /// Stop the audio engine
    open static func stop() {
        // Stop the engine.
        engine.stop()
        shouldBeRunning = false
        #if os(iOS)
        do {
