Backup diff of Music (No. 3)

• Backup list
• View the diff current.
• View the diff for visual.
• View the source.
• View the backup.
• Go to Music.
  • 1 (2016-10-29 (Sat) 19:32:08)
  • 2 (2016-10-29 (Sat) 22:26:30)
  • 3 (2017-06-08 (Thu) 22:46:02)
  • 4 (2017-08-22 (Tue) 22:15:57)
  • 5 (2018-04-27 (Fri) 09:07:16)
  • 6 (2018-08-05 (Sun) 07:11:00)
  • 7 (2018-11-11 (Sun) 22:49:48)
  • 8 (2020-05-04 (Mon) 22:49:07)
  • 9 (2021-03-14 (Sun) 17:43:51)
  • 10 (2022-05-21 (Sat) 17:41:13)
  • 11 (2022-07-09 (Sat) 13:28:52)
  • 12 (2022-12-26 (Mon) 23:42:26)
  • 13 (2024-02-19 (Mon) 23:32:52)
  • 14 (2024-02-20 (Tue) 00:38:08)

• The added line is THIS COLOR.
• The deleted line is THIS COLOR.

TITLE:Music (音楽)

- ピッチ　／　第３章　ピアノ調律
--  http://pianotuner.jp/text/3-1.html
- 楽器 ([[Instrument]])
- 音階 ([[MusicalScale]])