The Shin-ei Fuzz-Wah is a 1968 analog pedal that merges wah and fuzz into one foot-controlled unit. Rocking controls wah. Sliding left-right controls fuzz gain. Two switches activate effects independently. A third switch sets order. A knob adjusts fuzz volume. Powered by 9V battery or adapter. It remained in production, in some form, until 1984. Fender reissued it in 2008.
The Uni-Vibe is a 1968 Shin-ei footpedal phaser designed by Fumio Mieda. It creates chorus and vibrato simulations using an optical circuit: an incandescent bulb shining on LDRs inside a reflective shield drives staggered phasing filters—without op-amps. Its effect is a throbbing, hypnotic pulse rooted in atmospheric radio modulation, not Leslie emulation. It was modified to improve fuse access and add a speed foot pedal. Players value its lo-fi sweep but contend with bulb burnout, speed instability, and lack of precision.