Secret of Mana was originally developed and planned to be released for the SNES CD ROM extension (named Playstation!). It had way more content, graphics and music in CD quality. But, as we know, Nintendo suddenly stopped the plans for CD ROM and Sony created the Playstation therefore. And this angered Squaresoft too, as they had to rework the game and create a cut down version for the cartridge, and it was still more expensive compared to CD too. And later when Nintendo went with carts on N64 again, they had enough and developed Final Fantasy 7 for the Playstation.
Yasunori Mitsuda, the main composer of Chrono Trigger, worked so hard and poured his heart into the game that he got sick and could not work anymore. And because of a hard drive crash he lost ton of in work tracks. That's why Nobuo Uematsu helped him to finish the scores.