I play a Roland G1000 and not a Technics..I have found the need to use an expression pedal a must..most of the time I use it to bring in a "color" sound.. for example, while playing a piano in the right hand, i can bring in a color sound, maybe organ,guitar , etc..The expression pedal also allows me to bring in left hand "color" sounds such as choir or strings when desired...You can also use an expression pedal to change or blend one sound to another...I think you can see why I say the expression pedal is a must...I think Technics has some of the same assignable features as the Roland..Is that correct?