to the genesys,

There is market for 76-keys arranger, or to be more precise, there are customers that wants to buy TOTL arranger with 76-keys (meaning, 76-keys is just one of the feature they need, not the dominant one), but it's hard to find out how big this market is.

When Ketron produced SD-1 it was their onliest TOTL arranger, and only in 76-key version. Those who wanted to buy SD-1 for it's unique features like live-drums, great controllability, included sampler, have been buying it although they might not needed more then 61 keys.

Therefore it's quite hard to consider all buyers of SD-1 "76-keys market".

At the same time, some buyers of Yamaha Tyros 2, bought it because of lot's of features, good sounds etc., but at the same time they would like it to have 76-keys.

So, it's also quite hard to consider all Tyros2 buyers "61-key market".

Speaking about profit, if Yamaha consider the Tyros2 non-pro or mainly home-users arranger, and if majority of the home users would be quite happy with 61 keys they have three options:

a) produce 76 keys Tyros only, and raise the price to cover the costs

b) produce 76 keys Tyros only, and leave the price same

c) produce 61 keys Tyros only, (at the price for option b)

In the case of (a) situation, raised price might turn-off part of potential buyers, who would have to pay extra money for feature they don't want (as well as additional weight and width). But the income would be higher then in (b) situation.

In case of (b) situation, only users who object the weight and width would be turned-off, but the income would be significantly less (because of higher costs with same price) .

In case of (c) situation, only users who desperatly wants 76 keys would turn to Korg, Roland or Ketron), and all others (as we already said, non-pro users) would buy it, making this the most profitable option for Yamaha.

Korg behaves differently, as it's Pa2x Pro is geared toward professional users. Ketron is somewhere in the same path, with SD-1 before, and Audya (soon) in pro range, and SD-5 in home range.

Who knows why Yamaha behaves like this, they might have been preparing the market for some new kind of synth-arranger in-between home-arrangers and pro-sysnths.