Application allows users to store up to 4 different PDF's per song (sheet/chord/lead/tab). So you can store the piano sheet music and the guitar tab for each song. This can be used for all instruments. Each member of the band can store their own version of the music in their version of the application. These column headings are all user defined. You can rename the columns if you would like in settings.
Users can link their songs to YouTube videos or local media files allowing them to play with the artist. Playing along with your favorite artists will not only make you match their sound but it will improve your ability to play by ear and improve your ability to play with others.
Users can export songs with their attached PDF's and media for friends/family/band mates to import. Giving you an interface to share your songs so when you all get together you will all be ready to JAM!
Music teachers can record / store lessons online and then set the URL to their shared videos. Students can then use the application to view the PDF of the song while watching the lesson. Users without a music teacher can still set the lesson URL link for each song to How-To videos on YouTube. Seems like every song has one!