9弦ギター
https://youtu.be/F-r8wBqTNNQ?t=202
https://www.youtube.com/watch?v=9_FOGnmFrms

Agile 10弦ギター弾いてきた！
https://www.youtube.com/watch?v=0cUfocJRs6g

11-stringed guitar
https://www.youtube.com/watch?v=Ch1Q5yMkc8M

15 STRINGS BASS
https://www.youtube.com/watch?v=t3UaptsZOQQ

24 STRINGS BASS SOLO
https://www.youtube.com/watch?v=ggNRXu1avDk

1弦ベース
https://www.youtube.com/watch?v=NHcl6cyoU44

1弦ギター
https://www.youtube.com/watch?v=Heu3CStMV7w

Synthaxe
https://www.youtube.com/watch?v=mhmLkVHNHcE