Roland E‑4 Voice Tweaker: Portable Vocal Toolbox with Effects & Looping
The E‑4 features Auto‑Pitch, harmony, and vocoder, with hands‑on pitch and formant sliders. Its Scatter knob delivers tempo‑synced glitch FX, alongside reverb, delay, chorus, and a 24‑second looper (with overdub/undo and BPM detection). Offers ¼″ mic input, 3.5 mm mix/headset-in, USB‑C audio/MIDI, MIDI & sync I/O, and a rechargeable battery with approx. 3.5 h runtime