Now, Yamaha have announced a more affordable Tenori-On. The TNR-O (the 'O' is for 'orange') differs from the premium model in that it lacks the grid of lights on the back (so your audience can't see the nifty patterns of light it's making), and the magnesium casing has been replaced by a moulded orange plastic case; otherwise, it does exactly the same thing.
How much more affordable it will be is not yet known, though rumour has it that it may not be much cheaper. Perhaps someone can persuade Yamaha to port it to the iPhone or some similar gadget (the rumoured Apple tablet would be a natural platform), in the way that Korg have ported their MS-10 modular synth to the Nintendo DS.
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