It was originally conceived in order to perform Johannes Brahms ' Theme and Variations Opus 21a .
Commonly referred to as the cello - guitar , the Brahms guitar was invented in 1994 by classical guitarist Paul Galbraith in collaboration with the luthier David Rubio .
It was originally conceived in order to perform Brahms   ' Theme and Variations Opus 21a .
Commonly referred to as the cello - guitar , the Brahms guitar was invented in 1994 by classical guitarist Paul Galbraith in collaboration with the luthier David Rubio .