The JOYO R-31 is a reverb pedal. It is intended for adding space and ambience to a guitar signal.
Key identified features include stereo operation.
- Brand: JOYO
- Model: R-31
- Product type: Reverb Pedals
- Features: Stereo

This is a New JOYO R-31 Para-Verb Reverb Pedal from Joyo, listed in Reverb Pedals on Just Pedals. Read More below.
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JOYO have become a go-to brand for guitar pedals, offering a huge range of effects that deliver solid, reliable tone at an affordable price. Focused on simplicity and performance, their pedals are easy to use, well built and designed to slot straight onto any pedalboard without fuss.
What makes JOYO especially appealing is how much they offer for the money. From overdrive and distortion through to delay, modulation and reverb, their range covers all the essentials, often capturing classic sounds while remaining dependable and consistent. Whether you’re building your first pedalboard or adding to an existing setup, JOYO pedals give you flexibility without compromise.
JOYO pedals are simply great — practical, versatile and far better than their price might suggest. They’re trusted by players everywhere for good reason, and if you’re looking for quality effects without overspending, you will not be disappointed.
Reverb creates the dense pattern of reflections heard after sound enters a physical or imagined space. Room, hall, plate and spring models differ in reflection density, frequency decay and modulation, while ambient algorithms extend or transform the tail beyond natural acoustics. Decay, pre-delay, damping, diffusion and wet/dry balance define the apparent size, surface and distance of that space.
Processes, creates or passes two audio channels. True stereo preserves separate left and right inputs, while mono-to-stereo effects generate spatial differences internally; routing, phase behaviour and whether trails remain stereo determine the resulting image. Some outputs sum to mono when only one socket is connected, which can change level or modulation depth.