At the same time, he played in jazz and pop orchestras for the youth and people, and he collaborated with several Spanish orchestras and played in the radio and art centers of Tehran. He also played saxophone for the famous band Black Cats for a while. Hasan Shamaeizadeh started composing in 1351. He himself considers the main reason for turning to composition to be the inability to continue playing, which was due to cervical disc disease due to the pressure of long-term playing of heavy brass instruments (15–16 hours a day). Shamaizadeh’s first compositions were “Grieh” with the voice of Amir Rasaei, “Hala Khole Direh” with the voice of Arif, and “Nemiad” with the voice of Gogoosh, all of which were released together.