The circuit path through to the keyboard is the most likely area of the problem as it passes through two connectors to get to the keyboard. This power feeds into the MicroProcessor (CPU) and also through the keyboard and back into the decoder. They are both 'powered' by the same 3.3V DC supply rail fed from 10K Resistor(s) R838 pins 5 and 7. I think, not being a musician, that it also affects the '3rd' black key as well as they share the exact same wiring path up to the keys. How? Simply click here to return to Yamaha Keyboard User Reviews.Here is an image of the relevant part of the circuit which affects the E key. Join in and write your own page! It's easy to do. Other than this I give this keyboard a great rating and good value. A bigger problem is that as the finger playing happens to land close to the rear of the key so much pressure is needed to be applied to the key to operate it that the key becomes impossible to use. As an accomplished adult pianist I find this quirk very annoying since not only do I have to play the correct key but I have to know where exactly my finger will be on the key when I press it and to compute (in my mind) how hard I must press it to get the same touch sensitivity needed as when playing the same note at the 'light' end of the key. In summary touch sensitivity of the keys is not constant along the length of the keys. For beginners this may not be a problem since most playing utilizes simple music with little demand on legato style fingering.

In other words if the key is pressed at the extreme front of the key it requires just a light touch, however if the finger moves along the length of the key from front to rear then the pressure needed to operate the key increases dramatically as one nears the rear of the key. There is one item that has not been addressed, namely the key action being touch sensitive and light which it is, however the touch sensitivity varies in accordance to where exactly the position of the finger touches the key. The majority of reviews I have read have been positive and for the most part I agree with most of them.

Yamaha ypt 300