BM-15M Murf Box

The Behringer BM-15M Murf Box is an analog filter-sequencing pedal for guitar and synthesizer, designed to create rhythmic and evolving tonal movement. It uses 8 filters arranged across 12 selectable patterns, ranging from fast, percussive sequences to slower modulation. Envelope and Rate controls shape the filter movement, while Drive adds saturation and Mix blends the processed and dry signals. MIDI integration allows the patterns to synchronize with external gear such as DAWs and drum machines, while an expression pedal provides real-time control. USB connectivity and the Guitar Tribe desktop app provide access to custom presets, additional features and detailed parameter editing.