The only pieces I could have played with such figures were the Clementi Preludes with which I had started each half. No, they were'nt it. Then another listener suggested the Brahms Intermezzo, Op. 119, No. 1. I would never have identified the opening as a D major arpeggio.
First of all, it descends, F# to D, followed by B, then G. How is that a D major triad?
It was like a lesson in what is lacking in the way many blind people learn music: too little of it is based on auditory respect.
This event will haunt me.