Behringer BM-15M Resonance Filter

There's several things wrong with this device and they have been mentioned by other people.

With the clock too slow, you'll get rubbish results, but hit the sweet spot, at tempos to high to tap tempo, and the box jumps into life.

This is a time based effect and rate control is where you use it like a hero or zero. There is a tap tempo input but unless you can tap 16's, I wouldn't bother.

Fortunately there's a midi in for clock, but Behringer have decided not to share the midi implementation with the world.

Search for murf box pdf and life will become wonderful unless you are not using midi clock and cc commands. Without the use of clock divisions, this box might as well go in the bin.

I’d been looking at this pedal for a while, and now that I finally have it, I’m very impressed overall.

The only downside is that there’s no manual included in the box, and there isn’t one available on the Behringer website either. You have to figure things out by trial and error. That said, the controls become intuitive after a short time, and the discovery process was actually quite enjoyable.

The pedal offers 12 rhythmic patterns, giving plenty of creative options. By adjusting the frequency controls, you can get anything from auto-wah style sounds to more psychedelic filter effects. The Drive control is also a nice addition, adding a bit of grit when pushed.

Build quality feels solid, and the unit is quite large compared to standard pedals, so keep that in mind when planning your pedalboard.

For the price, this is excellent value. I honestly didn’t expect this level of performance at such a low cost.

I haven’t yet tried it with a synth or explored the external connections, but for guitar use alone, it’s already a very fun and inspiring pedal.