Can you tell some more words about this app bro? I think I need itIf you have an iPhone, download the app "iDrumTune Pro". So easy to use and backed by science. I have never heard any kit I have ever owned sound so good since tuning it according to this app. Has free tutorials explaining all the methods and the theory behind them. Response from the author (a Professor accoustics in the UK) has been prompt and very helpful. $10 well spent.