Mortazavi claimed his mother hid his violin in a cupboard for that period, although he would often play on the violin in secret until his mother eventually caught him. He would later take lessons from Ali Tajvidi, Parviz Yahaghi, Habibollah Badiei, Jahangir Kamiyan, Hasan Shamaizadeh. At the age of seven, he also started playing the piano, guitar, percussion, and folk string instruments such as oud, tar, and santur.