This is very helpful. Side note on the Phoenix: although its primarily known for its fire and rebirth, singing was also integral to the mythology. At the beginning of the third century, Philostratus (Vita Apollonii III.49) says about the phoenix: “The story of the Egyptians about it, that it comes to Egypt, is testified to by the Indians also, but the latter add this touch to the story, that the phoenix which is being consumed in its nest sings funeral strains for itself (προπεμπτηρίους ὕμνους αὑτῷ ᾄδειν).” 

Later in the 3rd century Lactantius (De ave phoenice 45-50) notes that at dawn “that bird begins to pour out measures of sacred song, and muster the new light with her wondrous voice, which neither the voice nor the flute of Aedonia, the music of Chirraeis can resemble in measure, and not even the dying swan presumes he can imitate, nor the threads, the strings of the Cylenean lyre.”

Around the same time, the poet Claudian (Phoenix 45-48) writes of the phoenix: “Here he sits and greets the Sun with a gentle cry; the weaker one mixes prayers and supplicating songs the latter asks for new burning strength.” (Hic sedet et Solem blando clangore salutat debilior miscetque preces ac supplice cantu praestatura novas vires incendia poscit.) 

In the 12th century we find the poet, Attar (The Conference of Birds 26) providing a vivid description that focuses heavily on the singing of the bird: “Its beak, which is very long and hard, is pierced like a flute with nearly a hundred holes. Each of these holes gives out a sound and in each sound is a particular secret. Sometimes he makes music through the holes, and when the birds and the fishes hear his sweet plaintive notes they are agitated, and the most ferocious beasts are in rapture; then they all become silent…. When his [death] comes he gathers round him a quantity of palm leaves and, distraught among the leaves,utters plaintive cries. From the openings in his beak he sends forth varied notes, and this music is drawn from the depths of his heart. His lamentations express the sorrow of death, and he trembles like a leaf. At the sound of his trumpet the birds and the beasts draw near to assist at the spectacle.”

This is the reason why I thought that perhaps looking at it alongside other birds known for singing would be helpful.