Dan-Erland Swanö (born 10 March 1973) is a Swedish musician who is currently the vocalist, guitarist, ex-bassist and ex-drummer for the band Nightingale as well as the Owner of Unisound but he achieved fame as the vocalist and songwriter of progressive death metal band Edge of Sanity.

As a multi-instrumentalist he is regarded as influential in the underground melodic death metal, black metal, progressive metal, death metal, progressive rock, power metal communities. He is known for his progressive rock-influenced songwriting style and his frequent use of both clean and growled vocals.

Swanö has fronted a number of bands, including Edge of Sanity, Brejn Dedd, Unicorn, Infestdead and Route Nine. He has also been a member of Katatonia, Ribspreader, as well as playing drums and lead guitar in death metal band Bloodbath.

He has also contributed his vocal talents to Arjen Lucassen's Star One project. The two musicians are good friends, with Lucassen contributing guitar parts to Swanö's Nightingale project. He can also be heard on the albums Theli and A'arab Zaraq - Lucid Dreaming by the symphonic opera metal band Therion. He was also producer and contributing writer of the band Diabolical Masquerade, the now defunct solo avant-garde black metal band of Anders Nyström aka Blakkheim (Katatonia, Bloodbath, ex-Bewitched). He also contributed some guitar solos, backing vocals on various Diabolical Masquerade albums, and played the drums on the album Nightwork. He also produced and played the keyboards on the Memories from Nothing album by Swedish progressive rockers Another Life, released on Vic Records.