Homebrew development oriented fork of Mesen-S - a cross-platform (Windows & Linux) SNES emulator built in C++ and C#. Deprecated; see https://github.com/SourMesen/Mesen2/
Open the CPU Debugger (Program counter will likely be at $8380BE BPL $8380BB)
Observe that some memory locations are named [noteInstrument] and [ready_notes+?] even though this section of code is about graphics and movement, not music.
Steps to recreate: