I didn't own hearing aids until about a year ago, and was very happy with them ; BUT i always took them off when I played my PSR 970 because all of my favorite styles sounded terrible. It was very inconvenient, but I persisted in doing that for most of 2003 UNTIL a few days ago , I read an article on how you can train your brain. So, a few days ago I started wearing my hearing aids whilst playing my PSR 970 and I can report that as each day goes by, my favorite styles are sounding quite good. I think that in a day or two I think that they will sound even better.