I am currently working on number 28. It is said to be one of the most difficult of Beethoven's 32 piano sonatas. It was difficult to get a "well, okay" and I finally uploaded the first movement. This piece is also going to take much longer. I think the difficulty in playing the piano and the difficulty in typing MIDI are totally different. The fingering on a live piano, especially the slight time gap that occurs when striking distant keys, affects the vividness of the performance.... In MIDI, the fingering on a live piano is input evenly without any problems, but the teacher explained this to us via Skype, showing us the fingering.