On Wings of Song/Editions
This is a partial list that doesn't include translations. For more details, see ISFDB.
US
Serialized in three parts in The Magazine of Fantasy and Science Fiction, February-April 1979.
St. Martin's Press, 1979. Hardcover. Cover art (by Michael Mariano): blackface singer, piano keys, spotlight. (Nitpick: the artist has painted Daniel with two pink spots on his cheeks, which is a look he has for a while, but not in his performing career.) ISBN 0312584660
Bantam Books, 1980. Paperback. Cover art (by Lou Feck): fresh-faced Iowa kid physically soaring above the countryside. ISBN 0553136674
Bantam Books, 1985. Paperback. Cover art (by Kid Kane): a sort of vinyl cyberpunk boy-band dude flying above a city, wtf. ISBN 0553250760
Carroll & Graf, 1988. Trade paperback. Same cover art as the 1985 Bantam, alas. ISBN 0881844438
Easton Press, 1993. Hardcover, leatherbound limited edition. Cover art (artist unknown): gilt line drawing, Art Nouveau-ish, figures entwined with musical staves and a woodwind. No ISBN.
Carroll & Graf, 2003. Trade paperback. Cover art (artist unknown): impressionistic cityscape, ghostly figure. ISBN 0786711221
UK & Australia
Gollancz, 1979. Hardcover. Cover art (by Malcolm Ashman): an angel in distress. ISBN 0575025476
Magnum, 1981. Paperback. Cover art (by Chris Moore): gaudily futuristic singer in metal headgear and shackles. ISBN 0417055803
E-book
Chu Hartley Publishers, 2016. No cover art.