It is an envelope filter with multiple mode, ascending, descending, and so on.
One could also say a wah.
The sound palette is extensive, especially a switch on top of the machine, allows you to select the frequency range over which it wishes to act.
It s'git a pedal to its format, while transistor, no lamps, and not digital.
The input / output (one of each) are TRS, 6.35 mm.
An on / off switch,
a frequency selection, three knobs and settings curve effect, a flitre ascending or descending, in switch, and a final switch to Drive.
I have no manual and I turn the knobs until you get the desired effect.
We pretty quickly get what you want, and I found different types of sounds very convincing, I almost regret not having more, Mutron.
The effects are great on guitar or bass, I have not tried on a keyboard, it works like hell, without distorting the sound of the instrument on an old jazz bass it's magic! But it works very well with the other instruments, eh! The descending filter is a kind of "Bouuuahh" very friendly and original that I used sometimes for lack of a fretless. The sound is thick, but never gets messy.
I have a few years, and it is often THE pedal that I take when I'm too lazy to take an entire pedalboard. Of course, this fits especially funk, urban music, and allows you to have a sound characterized when taking a solo, but you can find other applications.
I tried copying the Q-Tron Electro Harmonix. Not bad, but not the same, and I have an emulation, the ZOOM B3 which is not bad, but less "fine".
I love the sound ascending is not allowed as funky, solo, it's terrible bubbles, and we just want it to send large phrasing with this sound (So it goes either to support or Mireille Matthieu Patricia Kaas, you may not finish the tour!) The different modes are great, but you do need to adjust by hand, no presets, and yes it is the analog .
So if we want to move from one sound to another in real time, it's dead.
In terms of quality it's all metal knobs solid hypermarkets, connector top, it does not spit, do not purr or hiss!