Complaint was written in 1934 for Lucie Bigelow Rosen and is a small Elegy for Theremin and piano. To my knowledge this is the first time this piece has been performed or recorded since 1934. I think this music is very beautiful although I think the composer had a cello or violin in mind while composing because of the large intervals he uses. In any case this is a nice contribution to the original Theremin repertoire!
A big thanks to Thorwald Jørgensen for recording this piece and sharing it on YouTube!