We just had to share the RIFF iPhone guitar app with our readers.  It has a demo video that will absolutely leave you smiling when you watch.  The folks at MasterMedia Productions have put together an iPhone app that will let you play lead guitar over included jam-along tracks or any song from your music library.

But the really cool feature is creating bends and vibratos.   You create bends by sliding your finger along the app or vibrators by shaking your finger on button.  Check it out!  We’ve even added it our Fretbase-approved list of guitar iPhone apps.

RIFF keeps it simple by using colored buttons instead of trying to fit a guitar neck into the iPhone screen.  They also keep it even simpler by keeping you on the pentatonic scale (major or minor) – so long as you’re in the right key, there’s basically no wrong notes.  Music theory be damned!

Other features include a “Key Changer” and an “Octave Changer” to let you dial-in the right scale for your playing and a “Major/Minor Key Changer” for switching between major and minor pentatonic scales.   They’ve even built a nice graphic on their website to explain each of the features.

Find out more on the RIFF website.

Here’s the demo video: