piano

How many hours a day to practice piano to get good How many hours to get beethoven Waldstein schumann papillons debussy gardens in the rain Bach fugue and prelude in F# major good also how long practice scales on viola each day my friend wrote this

I just can't believe what i hear and see here : www.liveleak.com/view?t=CroTG_1548612267 PS I hope those with a grain of humor play along :)