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About CW Gotham Knights Harvey’s Trigger Music

Does anybody know what is the exact name of that piano music? ‘Cause I just find out that the English subtitle of S01E05 in the CW Website reveals a different name…  I really want to know, so I can listen to the whole music. 

* Here’s the update from James Stoteraux (one of the showrunners):

https://www.tumblr.com/egoismt/722688731000225792/the-music-for-harveys-personality-trigger-is-the?source=share

“The subtitle is correct that it’s Fantasia in D. I think it’s from the adagio – but not 100% sure on that. Our composer David Russo did an arrangement to make it a bit off kilter & imperfect – almost like a child rehearsing the piece as an echo of young Harvey practicing the piano in the story he told Dr. Meridian.”