well,this might seem silly, but actually i might listen to some actual samples of instruments downloaded from the net and when i play the same instruments on my keyboard, ill see wat i can do to make the waveform match that of the actual instrument.. whether i can add a dual voice, reverb ,chorus stuff like that. mostly to get the best overdriven and distortion guitar sounds... btw do u guys know any cheap module or something which produces dsp effects(to connect to the sound output of the keyboard before it goes to the speakers)?? by cheap i mean less than $100..