"It's become a habit to liked Heidelberg's rapid-fire vocals to various Frank Zappa projects and there's a definite connection between them and FZ's doo-wop inspired falsetto, but a more obvious parallel would surely be Björk. The comparison seems most accurate in light of something like the faux English accent on standout "Coal Mine", but it's also there in the sheer manic energy of the album's lines."
"British multitalented artist Heidi Heidelberg, who describes herself as an anarchic soprano, sings Schubert's "Meine Ruh' ist hin". And it's stunningly beautiful [...] Ms. Heidelberg, who arranged the piece herself, delicately and fragilely exposes the sweetness of the melody of Gretchen's monologue." LINK
The Arts Desk
"Heidelberg’s quasi-operatic vocals are entrancing, and her control of volume and tone, especially at the delicate end of her range, is breathtaking. The echoes span John Lydon to Thomas Adès" LINK
"The flawless high sounds of Heidelberg (who also plays guitar by the way) bring you ecstasy, but she also impresses with fast vocalese lines that are doubled with the piano."
"Special mention to the support act, the intriguing Anglo-Colombian duo Bitch ’n’ Monk. Mauricio Velasierra plays assorted flutes, Heidi Heidelberg plays guitar, sings and beatboxes, while the two transform their sound into junkyard electronica through the ingenious use of looping pedals. You’ll spend a while pondering how to classify them – prog folk? Operatic post-punk? Gothic reggae? – but they know how to write melodies."
All About Jazz
"The magnetic Heidelberg's wholly improvised passages oscillating between operatic high-wire and Beckett-esque darkness of the soul...Extremes in dynamics embraced, at one end, tip-toeing rustlings, where bass and drums were felt rather than heard, and, at the other end, explosive collective outbursts of punkish energy. In between, there were moments of choral-like synergy, free-jazz rumblings, passages of curiously rhythmic abstraction and, in turn, of gentle lyricism."
"Like Portishead's Beth Gibbons, Heidelberg dishes out dark-hued affairs of the heart with stinging, deadpan poise"