Yamaha has created a unique synthesizer, Vocaloid Keyboard, which is designed for real-time vocal synthesis using Vocaloid.
The proof-of-concept keyboard is optimized for entering Japanese characters with one hand. It has 16 buttons, for consonants, vowels, and the two types of voicing marks. The user enters those with the left hard, while playing notes with the right. This makes it possible to synthesize singing using the hardware alone.
The entered text and the pronounced text are shown in katakana on the LED display, so you can check that the content played is correct. There are also three parameter knobs, which you can use to adjust the vocal sound.
Users of the Vocaloid software can’t give live Vocaloid performances yet. But with this system, users can do realtime vocal synthesis. Translating Vocaloid to a keyboard could simplify and streamline vocal synthesis.
At this point, Vocaloid is a design concept, there are no plans to release this as a product yet.