Bidad is an album of joint works of Parviz Meshkatian and Mohammad Reza Shajarian, which was released in 1985. This album consists of two parts: the first part is in Homayoun and composed by Parviz Meshkatian[1] while the second part is in Homayoun and Shoor and is played by Qolamhossein Bigjekhani. Mohammad Reza Shajarian is the singer of both parts.[2][3][4][5]