For any song you play you will no doubt use a STYLE to accompany the melody. Looking at Waltzes, I have a few to choose from on my AR, so as I wanted to play Que Sera, Sera I chose one I felt would be suitable. A STYLE is made up of 8 'PARTS': Rhythm 1, Rhythm 2, Bass, Chord 1, Chord 2, Pad, Phrase 1 and Phrase 2. To me, the most important ones are the Rhythm and the Bass. The other 'PARTS' you can bring 'in' or 'out' depending on whether you want to hear them or not. But Rhythm and Bass ... ? You sort of need those!
On the STYLE I had chosen I found that the Bass PART had a little 'skip' in it; and based on a C chord, it played C and then C again, with a little 'skip' in between being the note of G (so if playing an F chord, it would play F, then F again, with the little 'skip' in between being the note of C). Staying on the 'root' and doing a little skip to the 5th drives me potty, particularly when it continues for any length of time. What is wrong with a 'straight' C followed by G? It's what our bass player in the band would have done. I often think the manufacturers of organs and keyboards feel they have to do something that sounds 'different' so there is more variety when they want to sell their instruments.
So priority No: 1 was to change the Bass PART to something I would rather hear. I can do this quite easily on my AR. I LOAD the Style into the button marked ACCOMP. PROGRAM and you can then see how all the 'Parts' are made up on the screen. To change the Bass PART I first have to DELETE what is in there, go to the RECORD button, then press the START tab (which sets off the Style in a 'Loop') and play the notes I want to hear in the Bass. This all has to be done in the key of C (so I would play C, then the G below it). I can hear what is playing in the 'LOOP', and if I am not happy with it I can DELETE it and play it again. When I am happy, I SAVE the Style to a USER slot (Eg. USER 1) and access the 'changed' Style from there. I don't know how one would do this on a Keyboard. Is it the same?
So I now have a STYLE to use, with a Bass PART I like, for playing Que Sera Sera. If you click the LINK below you can hear (a) a few bars of my original Waltz STYLE; followed by (b) the 'adjusted' STYLE with a 'straight' Bass. Either do a right-click to open this up in a New Tab; or press the 'back' button at the top when you have listened to it.
DEMO of Waltz STYLE with the original Bass PART, followed by the 'adjusted' STYLE