Jennefelt is known as one of the most important choral composers of his generation starting with the success of his Warning to the Rich (1977) for solo baritone and mixed choir which has awarded him international acclaim.
[2] Other choral pieces include Dichterliebe (I-X) — a compendium of musical settings to Heine’s poems, famously musicalized by Schumann in his song cycle of the same title, and Villarosa sequences — a choral suite sung to an invented language based on Latin words.
[3] He has also written works for chamber and larger orchestras, and his music has been performed in Swedish halls as well as internationally.
Jennefelt’s music is known for his expressive use of dissonance, grandiose textures, and stress on short syllabic structures.
His orchestral work Musik vid ett berg (Music before a Mountain) was intended to be paired with text in a melodrama setting, but ended up being an exclusive instrumental piece that still contains the intense dramatic expression.