
© Yamaha (via YouTube)
Winder (Stepping Out of the Slate #2)
A key, dedicated to just one song, like a music box. When the key is wound up, the song from the connected smartphone begins to play. Sound movements are generated according to the flutter of the spring, allowing you to enjoy the unique sound texture. The joy of interacting with the clockwork object may lead to a more intimate musical experience.

© Yamaha (via YouTube)
RhythmBot (Stepping Out of the Slate #4)
This is an evolutionary form of metronome that supports your performance with rhythm. Each of these four small robots play a unique acoustic sound. They can be linked to your smartphone to play rhythms to the tempo you are playing, and they can even join in and accompany you in real-time. Creating a rhythm through a session-like style is a great way to enhance the experience of playing music.
I absolutely love those quirky totems Yamaha created for a series called Stepping out of the slate which aims to give music applications and sound software a more tactile layer. Curious if they manage to make more out of those little accessories than just the prototypes.
yamaha.com/en/about/design/events_topics/stepping_out_of_the_slate/