Analysing a Piece You Are Going to Play
Analysis in the service of interpretation — analyse, decide, listen: formal map, harmonic skeleton, phrasing plan, voice hierarchy, and the interpretation worksheet on your own repertoire. First course of the DNSPM performer track.
Pianist and conductor Alfred Cortot founded the École Normale de Musique de Paris in 1919, where his interpretation classes became legendary. His « working editions » of Chopin and…
À retenir : An interpretation is built on analytical facts: knowing where the phrase is going, where the harmony tenses, and which voice leads — then checking every decision by ear, instrument in hand.
Why analyse before playing?
A performer who opens a score makes, willingly or not, dozens of decisions: where to breathe, where to lead the crescendo, which voice to bring out, how long to hold that arrival. The only question is whether those decisions are grounded or improvised. Analysis is not the academic garnish of instrumental work: it is its foundation — it is what tells you where the phrase is going (direction), where the harmony tenses and releases (timing), and which voice leads (balance).
Concretely, knowing that bar 6 carries an appoggiatura of the dominant changes the gesture: you lean into it, you do not rush through it. Knowing that the true tension of a minuet peaks at the end of its central section forbids giving everything from the first repeat. Knowing that the expressive line lies in the alto forbids letting the soprano crush it.
Two symmetrical traps lie in wait. Intuition alone: it produces interpretations that are seductive in places and incoherent at the scale of the work — you phrase one bar prettily against the sense of the form. And analysis that never becomes sound: the impeccable table of degrees that changes nothing in the playing is wasted time. Hence the rule of this course, which structures everything that follows:
Every analytical observation must translate into a playing decision, and every decision must be verified by ear, instrument in hand. An analysis that produces no decision is incomplete; a decision the ear contradicts gets revised (see the humility clause, section 6).