An (almost) octave of an organ keyboard, the twelve notes of the dodecaphonic scale. Drawn in Inkscape. 鍵盤 器官 地板 器官鍵盤
Standard 88-key piano keyboard. Distance between octaves is approximately 165 mm, per http://en.wikipedia.org/wiki/Musical_keyboard. Relative key dimensions similar to some commercial electric pianos. 地板 鍵盤 標準 88 鍵鋼琴鍵盤
A piano bar wallpaper inspired on the Open Clipart image http://www.openclipart.org/detail/i-love-music-wallpaper-by-mystica. 地板 欄 音樂 鋼琴酒吧壁紙