The accordion is often likened to a pocket orchestra. It can provide a bass and harmonic rhythm, while superimposing a melodic counterpoint or string quartet-style outfits. Instrumental practice (technical, rhythmic and harmonic) and theoretical practice (transcriptions, etc.). Aurélien Noel is an accordionist and accompanist to such great variety artists as Eddy Mitchel, Céline Dion and Roberto Alagna.