Ihy is not a musician. Ihy often holds the Sistrum meaning he detects changes in the Earths Electric Field. This relates him with the Strong Electric Field enclosure, Hathor who was often said to be his mother and Horus, the Strong Electric Field considered to be Ihy's father.
Plutarch said, that the shaking of the four bars within the circular apsis indicated the agitation of the four elements (water/sea, air, ground, fire) within the magnetic field or compass of the world, by which all things are continually destroyed and reproduced. The Sistrum is therefore a receiver or detector of the Electric Field conditions that drive climatic systems on the Earth, such as large storms, earthquakes and volcanoes.
He was worshiped alongside Horus and Hathor at Dendera. Ihy is positioned on the anode, meaning the ionosphere, connected to Heqet the negative charge delivered via birkeland current and Khnum, representing the earths ability to store surplus charge. Both Khnum and Heqet are giving Ihy the Ankh, showing that the negative charge delivered via the birkeland current (field alligned current) supports life.
[Isis, Sekhmet, and Neith.]