I have a SD1. I have in my memory a lot of songs I learned with my old keyboard (Yamaha PSR-740) and I cant play with the sd1. It would be nice to have the Single Finger option in the sd1 to be able to play all that music.Single finger works this way:
Cm is played with C and a black key before. C7 is played with C and a white key before.
Thanks,
Guillermo.

GuillermoRosado,

This depends on what keyboard you are playing. The above you mentioned is true for YAMAHA and TECHNICS.
For CASIO, Cm is played by playing the white key before the root key.

For Ketron, in Single Finger mode (Chrd Mode = Easy 1){Pls see page 51 of Owner's Manual for more} when you play only the key note, a major chord is obtained. Adding the 3rd minor, you create a minor chord. Playing the 7th with the key note, you obtain a 7th chord.

Thanks,

AJ