It has happened to all of us. We work hard all week and just on the day of the class we get a headache, the weather is bad and the planets align so that everything sounds bad that day. As a student I've

[Koehler #7. Book I. Op 3.] So far, this is one of the studies I have enjoyed the most. Despite the difficulty in maintaining sonority in the low register, control over slurred sixteenth notes, and phrasing