Piano manufacturer Roland is showing a remarkable piano at the CES fair for its fiftieth anniversary. This has an oak design with 14 built-in speakers. According to the Japanese company, the speakers are ‘strategically placed’ so that they can transmit sound in 360 degrees. As if that weren’t enough, the device also comes with four flying ‘drone speakers’, which contain Roland’s Pure Acoustic technology and create reverberation. They operate on a ‘special communication channel’ with low…