Hi Dan, I record my Korg is-40 one track at a time through a Soundcraft mixer into an Akai DPS-16 hard disc recorder. I do not use any of the effects on the keyboard, I record dry and add effects from the Akai.This makes a huge improvement in the sound over using the built-in reverbs.
I then layer several guitars and vocals over the keyboard backing tracks. The mic preamps in the Soundcraft were also a big step up from the ones in the Akai. I sing through a Studio Profects C-1 microphone into a FMR "really nice compressor" This combo is unbelievable!
This is much better than accuracy, you get flattery! A huge "bigger than life" sound. I have been hanging around pro studios since the mid '70s and I am astonished at the quality available to the masses today. I paid right at $2000 for the recorder,mixer,mic, and compressor, and the quality is great. Now if I could only sing and play up to the quality of my gear!
Bill E