In some lodges the emblem of the Organist, also known as Master of Talent or Musician.
(Some variations of) Memphis Misraim differentiate between harp and lyre.

This is a 54th degree (“Sublime Scalde”) tracing board and this:

Is the 55th degree (“Sublime Orphic Doctor”).
Top: General officer jewel. Year and designer unknown.
Bottom: Ancient and Primitive Rite of Memphis-Misraim in Freemasonry Aprons and Tracing Boards Part 2 – 34rd to 75th Degrees