Traditional Music is often available on-line in the abc format see The Session site for example. Most ABC tunes are public domain and free for everyone to use. TradHero is a teaching game for the android platform that allows the user to enter any abc notation they wish and play along as best they can. It's Guitar Hero For Trad!
Uses open source abc parser abc4j and expands on a (chromatic instrument tuner open source project)[http://gitorious.org/chromatic-tuner-for-android]. The tuner reads the notes you play on your instrument and matches them to the abc notes.
Developed as part of Global Game Jam 2014
This is a standard Android application. Install the Android SDK to put TradHero on your device.