To do any reasonably effective complex bass lines with a pedal-board, you need at least 25 pedal keys and use your two feet...a 32 note pedal board is ideal.

Problem is, you basically lose your Swell pedal, which is really needed for the dynamics. Then again, you could accent certain notes with the pedals, and play Left Hand bass.

These days, for nearly all my work, I'm quite content to let the arranger play my bass lines for me, and only very seldom use LH bass or pedals (we do have a small Roland PK-5 13-note MIDI Pedal Board in the studio storage room).

The instruments got better at playing bass...and, I got better at being lazy, although I still enjoy playing the Tyros4 several hours a day.

Ian