Old Blood Noise Endeavors BL-37 vs Walrus Audio Slö
The Old Blood Noise Endeavors BL-37 and the Walrus Audio Slö are both pedals sharing modulated. The Old Blood Noise Endeavors BL-37 leans lush. The Walrus Audio Slö leans ambient and octave.
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Blended from circuit-archetype lineage, dynamic feel, tone-signal overlap and tone-vector distance — the tone vector itself is derived from editorial description text, not a measured acoustic signal, so this reflects how similarly the catalog copy describes the two, not a lab measurement. Shown only within a gear class, and only where there's enough evidence to be meaningful.51% — moderately similar
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Genres both listings are associated with.- Ambient
- Shoegaze
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Derived from overlapping tonal signals across both listings.- modulated
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Citation/mention fame — how often this gear is cited across artist rigs and gear discussion.$159via Reverb
The Old Blood Noise Endeavors BL-37 Reverb is a variable-clock reverb in the brand's BL series, adding modulation at two points in the reverb trail to create a wandering, lush, ever-shifting ambience with a simplified control set. Its signature feature is the Clock slider, which moves the sound from a quick, bright, tile-bathroom echo to a dark, lo-fi, time-stretched reverb, giving immediate, tactile control over fidelity and character. The dual modulation keeps the tails moving and organic rather than static, making it well suited to ambient, shoegaze, and experimental playing where evolving texture matters more than a clean room sound. It rewards keeping a thumb on the slider to morph the reverb in real time, offering a distinctive, characterful take on modulated reverb.
The Walrus Audio Slö is a multi-texture ambient reverb built for lush, modulated, sleepy soundscapes, with three distinctive algorithms designed to bring dreamlike textures to life. The Dark mode adds a lower octave to the reverb trail for deep, wide, ominous atmospheres, the Rise mode is an auto-swell reverb that gently fades each note in for beautiful cinematic swells, and the Dream mode is a lush reverb with a latching pad function that sustains the signal when the switch is held. Onboard modulation adds movement and evolving washes, and the controls allow extensive adjustment from smooth, atmospheric decay to huge, washy textures. Each algorithm has its own color and character, and the interface is user-friendly. It is a favorite for shoegaze, ambient, post-rock, and cinematic players wanting evolving, dreamy reverb textures and pad-like sustain in a compact pedal.
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Genres this gear is documented as being used in.- Experimental
- Post-Rock
- lush
- ambient
- octave
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Occasions this gear suits — judged per model, or derived from its wattage, connectivity and category.- Live
- Studio
- Worship
- Live
- Studio
- Worship