Around 2011 I had the ambition of recording a piano album while I had no piano at hand. 
I used to carry a pocket recorder with me and each time I visited a place with a piano, I would put it inside and play a small improvised piece.
Ten years later, I listened to them again and created a few patchwork tracks using only various cuts from those samples, including occasional sounds of whatever was happening around the piano.
As far as I remember, various instruments have been used : a grand from a conservatory, several upright ones in France and Belgium, one from a cabaret in Lyon, and the one shown on the cover I learnt to play on as a child.