This is a departure from attempts at serious value.  A simple idea that would probably gain more traction in a viral YouTube video describing it, than in it’s actual release as an app, nevertheless, as an app it would be purchased on the sheer novelty value.

The app plays music from your music library to match the beat of music that you are hearing.  Upon installation, the app would analyze your music library and build a small database of the BPM (beats per minute) of all songs.  Later when the app is engaged, it simply listens to the music coming into the phone’s microphone and plays a song into the headphones to match the beat.  The headphones recommended would be sound blocking, of which there are various models already in existence, but from this device there would be a demand for more.  Separately, the technology for this already exists.

So, the basic premise.  You are taking your daughter to a Beiber concert, or perhaps  you are at a concert and the opening band is truly terrible.  If you were to just pop some headphones in you would certainly not enjoy whatever you were listening to.  With sound reducing headphones you can block the midrange and treble down to a bearable amount, but the bass would definitely bleed through, and make your song unlistenable.  Not to mention, even if you could completely block out the sound, you couldn’t really get into your own personal music.  God forbid you started bobbing your head or tapping your feet to a different beat than everyone else.  What a weirdo thing to do.

No need for that, just fire up the app.  In only seconds it determines the music you are being subjected to is 123 beats per minute, and quickly finds a Deadmau5 tune in your library of the same tempo.  Deadmau5 is now playing on your headphones, and it’s in complete sync with the concert.  If anything, the bass that makes it past the headphones and into your ear reinforces and adds a bit of flavor to your existing song.  Now the fun part, of course, is when your girl glances over at you to see you smiling and even bobbing your head to “her music”, and she thinks to herself, “yup Dad’s kind of cool, even he gets it!”