In this demo paper, a system that suggests new practice material to music learners is presented. It is aimed at music practitioners of any skill set, playing any instrument, as long as they know how to play along with a chord sheet. Users need to select a number of chords in a web app, and are then presented with a list of music pieces containing those chords. Each of those pieces can then be played back while its chord transcription is displayed in sync to the music. This enables a variety of practice scenarios, ranging from following the chords in a piece to using the suggested music as a backing track to practice soloing over. We set out the various interface elements that make up this web application and the thoughts that went behind them. Furthermore, we touch upon the algorithms that are used in the app. Notably, the automatic generation of chord transcriptions – such that large amounts of music can be processed without human intervention – and the query resolution mechanism – finding appropriate music based on the user input and transcription quality – are discussed
