Brand
JOYO Technology is a Shenzhen music-gear company whose range goes well beyond stompboxes. Its official catalogue covers guitar and bass amplifiers, acoustic and busking amps, effects, power supplies, interfaces, wireless systems and accessories. JOYO also says it develops acoustic-core technology and has applied for utility patents. JustPedals listings include the JF-21 Splinter distortion and JF-319 Green Legend overdrive, alongside mini amps and power adapters. That breadth matters when comparing products under the JOYO name: some are effects, while others support the rest of a guitar or bass rig.
Category
Delay records the incoming signal for a chosen interval and repeats it after the original note. Feedback returns repeats to the delay line, while tone, filtering, modulation and saturation determine whether echoes remain clear, darken progressively, wobble like tape or degrade like analogue bucket-brigade circuits. Delay time and rhythmic subdivisions govern the spacing and musical pattern of the repeats.
Tags
Records audio into a repeating cycle and permits new layers to be overdubbed over it. Maximum loop time, track count, undo depth, storage and synchronisation define how the layers can be built, corrected and aligned.
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.
Measures repeated foot taps and converts their interval into an effect rate or delay time. Subdivisions translate that pulse into dotted, triplet or other rhythmic values, while averaging and range limits influence how quickly and accurately the tempo settles.