Théodore Lack (3 September 1846 – 25 November 1921) was a French pianist and composer.
[2] A very precocious boy, he was appointed organist in his native town at the age of 10 and held this post until he entered the Paris Conservatory in 1860.
He published a piano method, for which he won Claude Debussy to contribute a piece, The Little Nigar.
[citation needed] From 1875 to 1905 he was a member of the committee on admission and of the jury of examinations.
Early in his career he wrote several compositions featuring, or using as accompaniment, a now-obscure instrument called the pyrophone, and apparently was the only composer to specifically write for it.