Steve, great to hear your T4 gig went well.
After the 1.02 OS update, in addition to the noted bug fixes, I can swear I hear a noticeable improvement in the overall Tyros 4 sound as well. The sound seems warmer and also punchier at the bottom end (no EQ settings altered). Anybody else notice this? All going well, I definitely plan to use Tyros 4 on my New Years Eve Gigs! Having now compared Tyros 4 'side by side' with a Tyros 2, as well as a Tyros 3, I can unequivocally state that Tyros 4's terrific sound advancement is clearly apparent and appreciated.