Blockly Music - notes position on staff are off by an octave

[moniika]

In the music game, the notes appear in the wrong position of the staff in the dropdown picker and in the visualizer on the left of the screen.

The note currently played for C4 is middle C (~262Hz).
Middle C is not determined by the note name (in midi standard middle c can be named C3 or C5), but rather by the pitch (frequency). Middle C should always appear on the first ledger line below the treble staff.

However, in the game, the middle C note incorrectly appears an octave above where it should be.

Context

https://groups.google.com/g/blockly/c/br4oZAHHWww