This music was on the E3 demo cartridge for the Twilight Princess hype, and has been ripped but only in a 40kbps quality whereever I look. If you’re unsure which piece it is exactly, it’s the reworking of Ocarina’s Hyrule Field music, which I must prefer to the Twilight Princess incarnation that was finally used.
If anyone can get their mittens on a higher quality version of it, not that it’s been a fair while, I’d be very grateful.