Every Difference is a Difference (DK) is a solo piano project by Darius Heid that explores the acoustic depth and resonant possibilities of the piano through slowly unfolding compositions, preparations, and attentive listening. Drawing on an ongoing artistic research into overtone interactions, sympathetic vibrations, and fragile resonances, the performance reveals the instrument as a dynamic sonic body rather than a fixed musical object. With an openness to emergent acoustic phenomena, the work invites audiences into a contemplative listening experience where subtle details are central. Every Difference is a Difference offers an intimate concert performance that foregrounds resonance and perception.