Who wrote the sonic theme songs?

The original Sonic the Hedgehog theme song, "Green Hill Zone", was composed by Japanese video game composer Masato Nakamura. Nakamura has also composed music for other Sonic the Hedgehog games, such as Sonic the Hedgehog 2, Sonic the Hedgehog 3, and Sonic & Knuckles. Other composers who have contributed music to the Sonic the Hedgehog series include Jun Senoue, Kenichi Tokoi, and Howard Drossin.