The word aftertouch is a term used to describe the response of a key on electronic MIDIkeyboards to pressure. On an electronic keyboard with aftertouch, a performer can
change the amplitude of the pitch after the attack by varying the pressure with which one
holds the key. While this feature is not an option on a classical acoustic piano, where the
sound of the pressed key simply fades out after the attack, the richness and variety of the
piano timbre is far more superior and individual on every single instrument.
Exploring the sensitivity of the piano keys to the different types of pressure (including the
silent pressure of the keys with the Sostenuto pedal held) is my interpretation of the term
aftertouch, if one can apply it to the acoustic piano. On the other hand, this title implies
the composer’s intent to make the listener pay attention to the life and death of each
sound with regard to the variety in attacks and decays. This variety and timbral richness
of the instrument, along with the resonances of short and sustained sounds, which
produce quite different effects, were the main inspiration for this piece.

The word aftertouch is a term used to describe the response of a key on electronic MIDIkeyboards to pressure. On an electronic keyboard with aftertouch, a performer can
change the amplitude of