One of my friend is pianist and while I am not educated in classical music, when I heard him play, it moved me.
He wanted to have his special chair for playing the piano. In Europe, human scale is different from that in Japan. As a result, he had great difficulty to finding a suitable chair. The perfect chair, for him, is lower to the ground and inclined forward to maintain perfect posture. Since he often travels for concerts, the chair must disassemble easily.