     override func tearDown() {
         // This method is called after the invocation of each test method in the class.
         AudioKit.disconnectAllInputs()
-        AudioKit.stop()
+        try! AudioKit.stop()
         super.tearDown()
     }
 


    func AKTestNoEffect() {
        if let existingOutput = output {
            AudioKit.test(node: existingOutput, duration: duration, afterStart: afterStart)
        }
        let  localMD5 = MD5
        XCTAssertTrue(localMD5 == sineOscillatorMD5, localMD5)


    func AKTestMD5Not(_ md5: String) {
        if let existingOutput = output {
            try! AudioKit.test(node: existingOutput, duration: duration, afterStart: afterStart)
        }
        let  localMD5 = MD5
        XCTAssertFalse(md5 == localMD5, localMD5)
