The invention of the Sitar is commonly credited to Amir Khusrau (Sufi musician&Poet).
Amir Khusrau was a great poet and a musician of the Delhi Sultanate period.
He invented the Sitar and Tabla.
The tabla was invented by dividing the mridangam into thin tabla.
He created and introduced a new form of a chorus with Persian and Turkish
music.
They are Qawali and the Khayal.
He is also associated with Ghazal.