recently i bought a gnx4 on ebay and it hasn't came yet in the mail but i have a few questions about it for anyone who knows do they have built in metronomes not in the drum machine just a plain metronome and i know you can download the preset patches but say for instance the song money by pink floyd during the solo the tone switches so is there something in the patches to press a foot switch so the tone goes to the solo tone i know i didnt word this well so it may sound confusing