sangeetam natyam

Samyakha geetayate iti sangetam.
That which can give audio pleasures soothes the soul is sangeeta—music.
Samayak translates to good or soothing.
Music is joyful and joy is the manifestation of the divine.
Gitena priyate devaha sarvjnah parvati patihi
Gopatirantopi vamshadwanivamsham gatah
Samgitirato brahma veena sakta sarasvati
Kimnye yaksha gandarva-deva-danavah-manavah║
The gist of which is that god- man-demon all respond and enjoy music. Sangeeta or music is the upaveda and is called gandharvaveda.
Lord Shiva tells parvati about creation and its link with music.
The first creation prithvi—came the percussion sounds.
Then came water with conch
Then came Agni who gave metal instruments like cymbals
From the wind arose the wind instruments like the flute
From the akash came the string instruments like the veena.
Evam sadhashiva proktam shastram sansajnakam
Bharatdaistu munibhi sarvarthart pracharitam
From the Shiva came the knowledge music and initiated by him Bharata and his disciples propagated it round the world.
When one says sangeetam it is
Geetam vadhyam thatha nrtyam sangeetamuchyate
I.e. sangeeta includes music dance and song.
Moreover
Vinavadhana tatwajnha—jativishardaha
Talajnaprayasena mokshamargam niyacati║
The knowledge of instruments awareness of rhythm are all pathways to salvation.