Sony released a music player called rolly which is a robot which can dance for your song its in the shape of a egg it has two wheels and colored lights on the ends of the wheels which makes it to rotate and spin in many directions it has two arms that can open and close the wheel and the arms move according to the music played you can see that in the video. Its provided with a Bluetooth for transferring music from other devices which can bee played while sending like streaming. Though rolly can dance for a song immediately while steaming Sony provides a Choreographer software which first analyses the music file and creates better dance movements for rolly .mtf files are used to save the dance movements of a particular music
