There is Sweet Music, Sir Edward Elgar arr. Andi Cook. Brass Band

Composer: Sir Edward Elgar
Arranger: Andi Cook
Instrumentation: Brass Band
Grade: 2 - 3
Duration: 4'35''
Item number: BVT096
One of Sir Edward Elgar's strange and ethereal part songs, based on 'the lotos eaters' by Tennyson. It was written with the choir split across two keys a semitone apart, the men in G, the women in A-flat.

Should sound terrible, but thanks to Elgar being a certified genius, actually sounds haunting and strangely beautiful....