Rivera designed the Acoustic Shaman as a fully analog chorus/vibrato pedal with added low and high EQ specifically to enhance acoustic guitar tones. It supports both balanced and unbalanced inputs and is the only chorus pedal optimized for Taylor Guitars’ Expression System (ES), preserving up to 6 dB of signal that might otherwise be lost. The pedal features independent LFO controls (Rate & Depth) for both chorus and vibrato, a three-position Mode switch, a 2‑band EQ, Effect Blend control, and stereo or mono output options.