The Source Book On Sikhism

(iii) The Musicians/Bards of the Sikh Gurus

Mardana - He was companion and musician of Guru Nanak. There are 3 sloaks of Mardana in Bihagra Di Var ( page 553).

Sata & Balwand - They were bards in the court of Guru Angad. Once in their ego they thought that the glory of Guruís house was due to their singing. They resigned and did not come to the Guru. After a few days they realized their folly and came back to the Guru for forgiveness. They were duly forgiven. There is a Var in praise of the Guru in Guru Granth Sahib, in Raag Ramkali (page 966).