I practiced Bach's Sinfonia No. 10 on my upright piano and recorded its performance with a PIRECO machine made by KAWAI on 9.29.2024. Tuner Mr. Takahiro Natori installed an action modification package called "Grand Feel" provided by Fujii Piano Service on a Yamaha UX1 upright piano. Since then, we have been concerned about his recent health conditions and have had the piano tuned by another qualified person, ‘Ms Hiroko Ito’, and I am sorry that it has been a year and a half since the last tuning. I use the Learner's Edition score by Giichiro Ichida, which saves me from having to consider fingerings. It would be even more greatly appreciated if you could give me any advice about this performance. Thank you very much for listening.