App Name: Walk Band [Android App]

Cost: Free

Developer: Revontulet Studio

App Market: Download Page

Description:

Love music? Want to play on your Android device? Well Walk Band from Revontulet Studio is a toolkit of virtual musical instruments customized for Android device.  The app contains a huge number of features including Piano, Guitar, Drum Kit,Drum Machine, Bass, Multi-tracks Synthesizer, Music Zone, Sound plugins and more.

All instruments use the realistic instrument sounds. You can add the drum beats and guitar chords to your piano melody.  Another feature is that you can connect an external MIDI keyboard over USB or a YAMAHA, Roland midi keyboard/controller. The app is free to download. Make sure to check out their website for more information.