# YK pop modulation/key change

what does +n sharp/+n flat mean?
- E major->B major/C major->e minor/e minor->D major are all instances of "+1 ♯"
- C major->d minor/A major->D major/d minor->g minor are all instances of "+1 ♭"
- +1 ♯ is equivalent to -1 ♭, +1 ♭ is equivalent to -1 ♯; we always use positive number

## examples
プラチナ
https://www.youtube.com/watch?v=u0ZKkUhrLnM&t=17s +3 ♭
https://www.youtube.com/watch?v=u0ZKkUhrLnM&t=24s +3 ♯
https://www.youtube.com/watch?v=u0ZKkUhrLnM&t=29s +3 ♭ +3 ♯
https://www.youtube.com/watch?v=u0ZKkUhrLnM&t=39s +2 ♯ +2 ♯
https://www.youtube.com/watch?v=u0ZKkUhrLnM&t=77s +3 ♭
https://www.youtube.com/watch?v=u0ZKkUhrLnM&t=84s +3 ♯
https://www.youtube.com/watch?v=u0ZKkUhrLnM&t=88s +4 ♭

月光シンフォニア
https://www.youtube.com/watch?v=wLMyFgPjSio&t=46s +1 ♯
https://www.youtube.com/watch?v=wLMyFgPjSio&t=52s +3 ♯
https://www.youtube.com/watch?v=wLMyFgPjSio&t=82s +3 ♭
https://www.youtube.com/watch?v=wLMyFgPjSio&t=97s +3 ♯
https://www.youtube.com/watch?v=wLMyFgPjSio&t=120s +3 ♭
https://www.youtube.com/watch?v=wLMyFgPjSio&t=129s +1 ♭

アクエリア舞う空
https://www.youtube.com/watch?v=7mk_NYwsDKM&t=63s +1 ♭
https://www.youtube.com/watch?v=7mk_NYwsDKM&t=77s +1 ♯

めぐれ
https://www.youtube.com/watch?v=m9QscDlic_A&t=36s +3 ♭
https://www.youtube.com/watch?v=m9QscDlic_A&t=48s +3 ♭
https://www.youtube.com/watch?v=m9QscDlic_A&t=61s +1 ♯
https://www.youtube.com/watch?v=m9QscDlic_A&t=67s +4 ♯
https://www.youtube.com/watch?v=m9QscDlic_A&t=70s +1 ♯

奇跡の海
https://www.youtube.com/watch?v=ux90A4YDLdo&t=43s +2 ♭
https://www.youtube.com/watch?v=ux90A4YDLdo&t=80s +2 ♯

約束はいらない
https://www.youtube.com/watch?v=qw43PqaRlg0&t=109s +3 ♭
https://www.youtube.com/watch?v=qw43PqaRlg0&t=112s +3 ♯
https://www.youtube.com/watch?v=qw43PqaRlg0&t=118s +3 ♭
https://www.youtube.com/watch?v=qw43PqaRlg0&t=130s +3 ♯
https://www.youtube.com/watch?v=qw43PqaRlg0&t=148s +3 ♭
https://www.youtube.com/watch?v=qw43PqaRlg0&t=151s +3 ♯

hemisphere
https://www.youtube.com/watch?v=1_FBtoxWZjA&t=18s +3 ♭
https://www.youtube.com/watch?v=1_FBtoxWZjA&t=68s +3 ♭
https://www.youtube.com/watch?v=1_FBtoxWZjA&t=77s +5 ♯
https://www.youtube.com/watch?v=1_FBtoxWZjA&t=81s +1 ♯

走る
https://www.youtube.com/watch?v=-rwPu6c0jDY&t=76s +4 ♯
https://www.youtube.com/watch?v=-rwPu6c0jDY&t=108s +4 ♭

ファド
https://www.youtube.com/watch?v=LOQjikO9zx8&t=114s +3 ♭
https://www.youtube.com/watch?v=LOQjikO9zx8&t=128s +3 ♯

another grey day in the big blue world
https://www.youtube.com/watch?v=M9jw7yCtMWY&t=178s +4 ♯
https://www.youtube.com/watch?v=M9jw7yCtMWY&t=196s +1 ♭
https://www.youtube.com/watch?v=M9jw7yCtMWY&t=201s +3 ♭

reunion
https://www.youtube.com/watch?v=8N1VcI0xrhs&t=149s +3 ♭
https://www.youtube.com/watch?v=8N1VcI0xrhs&t=182s +3 ♯

青い瞳
https://www.youtube.com/watch?v=K541-kOzay8&t=53s +1 ♭

cloe
https://www.youtube.com/watch?v=QujlhpeQGGU&t=31s +1 ♭

指輪
https://www.youtube.com/watch?v=aUJBQfPKQqA&t=123s +3 ♭