NextTimer = NSTimer(timeInterval: (60.0/Double(bpm)) * 0.01, target: self, selector: 'tick:', userInfo:, repeats: true) MetroTimer = NSTimer.scheduledTimerWithTimeInterval(60.0 / bpm, target: self, selector: Selector ('MetroClick'), userInfo: nil, repeats: true) PreviousClick = CFAbsoluteTimeGetCurrent() NoteInBar = 0 // What Note You Are On In Bar Var noteInBar = 0 //What Note You Are On In BarīarNoteValue = 4 // How Many Notes Per Bar (Set To Amount Of Hits Per Pattern) Var barNoteValue = 4 //How Many Notes Per Bar (Set To Amount Of Hits Per Pattern) Var bpm = 60.0 //Tempo Used for beeps, calculated into time value Var previousClick = CFAbsoluteTimeGetCurrent() //When Metro Starts Last Click Let soundFileClick = NSBundle.mainBundle().pathForResource('metronomeClick', ofType: '.mp3')

Var clickPlayer:AVAudioPlayer = AVAudioPlayer() If you can easily spot my error would be great for one more kick in the right direction and I am sure it can work soon! Thanks so much. But I still would rather get it all with this NSTimer. But the only thing Is I dont get to detect the loop points for visual updates so I have my basic NStimer just detecting the timing intervals underneath the audio being processed and it seems to matchup very well throughout and no delay. I am looping this back and works very well.

Where I have a very small audio file with one click and dead space at the end of it with the correct duration until for a loop point for specific tempos. I currently am prototyping another method as well. I apologize on my ignorance for this one. But I am still getting 2 fast clicks in the beginning and then it settles in.

At this point here is how my code is structured. So I have implemented and cleaned up at this point after the feedback I had last recieved. Now I see many confused by this Including myself and I would love to get down to the bottom of this Metronome business and get this solved and share it with all those who are struggling. Or if you choose use NSTimer then it should be on its own thread. Now after all my research I have seen people mention you should use other Audio tools not relying on NSTimer.

The only issue I am having right now is when the timer starts the first 2 clicks are off time but then it catches into a solid timeframe. I Have built what seems to be a solid system using NSTimer so far. I am trying to build a reliable solid system to build a metronome in my app using SWIFT.

Flat io metronome speed change