Disclosed is a computing device to allow for the selection and display of a multimedia presentation of an audio file to a user. An interface device couples the musical instrument to the computing device by performing A/D conversion of the musical instrument's analog audio signal to create a digitized...http://www.google.de/patents/US7081580?utm_source=gb-gplus-sharePatent US7081580 - Computing device to allow for the selection and display of a multimedia presentation of an audio file and to allow a user to play a musical instrument in conjunction with the multimedia presentation
