Male choirs can have an advantage over their female counterparts when it comes to octaves, especially if they range from bass to countertenor, but women's voices, in harmony, have always had a unique appeal for composers.
Debussy's Nocturnes and Holst's The Planets would be unthinkable without their ethereal chorus; there is also much gender-specific choral repertoire from the chants of Hildegard of Bingen to contemporary New Zealand music such as Eve de Castro-Robinson's Chaos of Delight #III.
Rhinemaidens is a fascinating collection of German and Austrian music for women's voices, beautifully performed by the French Ensemble Pygmalion under Raphael Pichon.
The disc's title makes strong Wagnerian connections and the first track is a bijou version of the opening of Das Rheingold, with Wagner's sumptuous orchestral canvas shared between harp, four horns, two double basses and 24 women's voices. Its 21 tracks are cleverly grouped into sections, from songs of mermaids and serenades to a final celebration of the river maidens.
But am I the only one to look in vain for mermaids in a rather sentimental setting of Psalm 23 by Schubert? On either side of this, two lustrous a cappella Schumann songs offer darker glimpses into the mysteries of the sea and its supernatural beings.