There are a number of pedals out there which combine 2 or more drive voicings, but none that I can think of which are quite as distinct as this. Being a sort of 3-Channel Overdrive / Distortion - actually 2 Overdrives and 1 Distortion which you can route independently or all-together in parallel arrangement.
And to make this ever more expressive and distinct - 2 of those channels have delays attached to them. The middle Green soft and hard clipping Overdrive is actually the mellowest, followed by the Blue left-hand Discrete Transistor Overdrive, and the Purple right-hand hard-clipping Distortion being the most aggressive. So each very much has its own character that you blend together via the various Volume controls. The Deviate Knob then introduces increasingly random variation between the Blue Channel and Green Channel Delays - where Time is obviously Delay Time, and Decay is Feedback.
Further to this the Blue Overdrive has its Gain function on a toggle-switch - so you can operate that channel mostly as a Delay / Modulation should you wish to - with interesting Chorusing and Flanging textures easily achievable among other modulations.
Controls - BLUE TRANSISTOR OVERDRIVE } Gain switch, Volume, Tone, Time (Delay), Decay (Feedback), GREEN SOFT + HARD CLIPPING OVERDRIVE } Gain, Volume, Tone, Time (Delay), Decay (Feedback), DEVIATE (Random variation between the 2 delays), PURPLE HARD CLIPPING DISTORTION } Gain, Volume, Tone.
Note that there is one Mono In, but three Mono outs - a Main one which combines all 3 voicings in parallel - where you can isolate the Purple one if you wish, as well as dedicated outputs for the Blue and Green Channels. There is also an Expression port on the left-side of the pedal that allows you to control the Deviate control with an expression pedal.
OBNE describes the 3 Channels / Drive Circuits as follows :
PURPLE - is a hard-clipping distortion that can be seen as the core gain sound of the Beam Splitter. Of Beam Splitter’s three gain sections, it is arguably the heaviest and most compressed. It has three controls, identified by their purple knobs and labels – Gain, Volume and Tone.
GREEN - is an overdrive with both soft and hard clipping. It is the lightest and brightest of the three gain sections in Beam Splitter. Also featuring Gain, Volume controls the green gain circuit features a Time knob, which sets the delay time, up to 125 sections. When blended in parallel with the other drives, this delay time can create anything from tight comb filters to loose doubling delays to short slapback. Additionally, there is a Decay knob, which sets the feedback of the delay, from one repeat up to many repeats trailing off. In comb filter settings this can increase resonance.
BLUE - is a transistor Overdrive and the most neutral and reactive of the three gain circuits, with a gain range somewhere in the middle. Its Gain switch sets the amount of breakup. In the down setting, it is less overdriven, with less compression in the mids and highs. In the up setting, it is more overdriven and aggressive. It also boasts Time and Decay controls, on top of the Tone and Volume knobs and gain switch.