160 Eight-Measure Exercises No. 9, Op. 821
Compound time returns - but now both hands are fully active.
Carl Czerny - trained by Beethoven, teacher of Liszt - designed the 160 Eight-Measure Exercises, Op. 821, to revisit technical frameworks in new keys with added difficulty, creating a spiral curriculum where the student encounters familiar territory at higher demand. No. 4 introduced 6/8 compound duple in C major; No. 9 returns to the same metre and Vivace tempo but moves to F major and makes both hands equally active.
The additional left-hand independence in No. 9 changes the exercise fundamentally: where No. 4 was primarily a right-hand compound-time drill, No. 9 demands that both hands synchronise triplet groupings at speed without either hand drifting into simple duple. The eight-measure format leaves no room to lose the compound feel mid-exercise and recover gracefully.
Lock both hands together at slow tempo before raising speed.
Practice the left hand alone at 55% until the 6/8 grouping is fully automatic. Then practice the right hand alone. Only when both hands feel the two-beat compound pulse independently should you combine them - starting at 60% and raising by 5% increments. If either hand reverts to feeling six beats, stop and return to the two-tap body exercise before continuing.
Before you practice.
01 How does Czerny Op. 821 No. 9 compare to No. 4?
Both are Vivace in 6/8 but No. 9 moves from C major to F major and increases the demands on the left hand, which carries more independent motion. It is the natural next step after mastering No. 4.
02 What does Czerny Op. 821 No. 9 develop?
Fast compound-duple coordination in F major, training both hands to synchronise triplet groupings at Vivace while maintaining the light, forward-moving character of 6/8 rather than plodding through six counts.
Synchronisation is the specific skill here.
The coordination challenge in No. 9 is not just speed - it is keeping both hands in the same compound rhythmic framework simultaneously. At any tempo, if the hands sound slightly offset or if the lilt disappears, slow down and re-establish the shared two-beat pulse before continuing. Section-loop the most rhythmically unstable bar until both hands navigate it cleanly. Wait-for-note mode is useful for confirming that the compound triplet groupings align exactly between hands.
