Synths and grooveboxes combine sound generation, sequencing and hands-on control for electronic parts, patterns and textures. Depending on the unit, the workflow may centre on analogue or digital voices, drum sounds, samples, MIDI, USB, CV or standalone battery operation. Compare polyphony, memory, sequencing depth, sync, audio outputs and controller layout with the way you plan to use it. These products can complement pedalboards, but they are often self-contained instruments rather than conventional guitar effects.