https://i.ytimg.com/vi/P8VabAJWSyM/hqdefault.jpg

Part 1 of the video series modeling a Grand Piano.
I was asked to model a Grand Piano and here I am starting it by making the sides, top and blocking in some of the front pieces.

Reference images:
Piano Top:
http://www.zerobio.com/blender/images/piano_top.png

Piano Side:
http://www.zerobio.com/blender/images/piano_side.png

Part 2: https://youtu.be/2QvCAgv4eSc
Part 3: https://youtu.be/9fE9HvOxP8c
Part 4: https://youtu.be/E3CXUj779-A

source