                 options = .Loops
             }
             internalPlayer.scheduleBuffer(
-                audioFileBuffer,
+                audioFileBuffer!,
                 atTime: nil,
                 options: options,
                 completionHandler: nil)

    }
    
    /// Replace the current audio file with a new audio file
    public func replaceFile(newFile: String) {
        internalFile = newFile
        reloadFile()

        let frameCount = UInt32(totalFrameCount - startingFrame)
        internalPlayer.prepareWithFrameCount(frameCount)
        internalPlayer.scheduleSegment(
            audioFile!,
            startingFrame: startingFrame,
            frameCount: frameCount,
            atTime: nil,
