Swelter is: B. Drost, E. Delobel, G. Boontje, J. Zoet and M. Hartsuiker Vocals, acoustic guitar, electric guitar, samples, keys and omnichord by B. Drost Electric guitar and e-bow by E. Delobel Violin, piano, keys, tambourine and vocals by G. Boontje Bass guitar and vocals by J. Zoet Drums by R. Ahlers