“From the exceptional blast of motorik that opens the work in “Smoke” to the meandering synths and analogue bleeps of “Abyss” down to the ambient, Tangerine Dream bliss out of “Control”, Hidden Tracks is an ode to the diversity of everything exploratory in the krautrock moment. It’s not stale pastiche (thankfully), however, with some distinct dub moments throughout, and crusty drum loop cutups that would do Massive Attack proud raising their heads during tracks like “Crossroads.” It is nostalgic music, but not music that is bound. The pair feel comfortable to push into areas not imagined in the 70s, all the while looking lovingly backwards. And, aside from the brevity of the tracks, what keeps things really fresh throughout is a constant melodicism. Rather than simply building aural textures, the duo inhabit their sonic world with memorable musical refrains, further extending the metaphor of a classical musical suite.” Cycle Defrost - Adrian Elmer “[The EP’s] autumnal ambiance drips with steely darkness and a muted, yet ever-present sense of melancholy. CHLLNGR and Dr. Echo have created a Danish Frankenstein with all the requisite sounds of science and technology. Hidden Tracks, like its unlikely black metal ancestors, cultivates and defines a seasonal temperament. Namely, Hidden Tracks has the spooky and suggestive feeling of fall, and as a result, Hidden Tracks should be listened to with the lights off and the creature feature on.” In Your Speakers - Ben Welton “The piece's mood is indicated by the claustrophobic, uncanny cover art: the ten seamlessly linked tracks unfold a nocturnal, urban nightmarish atmosphere, with dub-heavy textures held together by piercing, insistent rhythms, occasionally enriched by unexpected guitar patterns or synth effects. Hidden Tracks makes no effort to hide its somber sentiment, which makes the album a perfect companion for the looming days of fall.” No Fear of Pop - Henning Lahmann ""Last Call” provides our first glimpse into the partnership, with its gliding, G-funk-indebted synth runs and ghostly, dub-wise sonics yielding a track that is haunting in its ominous atmosphere. Thankfully, the production is also incredibly comforting due to the array of interwoven textures, which make its sonic field unexpectedly inviting.” XLR8R - Glenn Jackson “Dense and cinematic; it can be imagined perfectly alongside a quiet car chase scene before it really explodes. A collaboration that is equal parts evil and drudgy.” Impose Magazine - Dayna Evans