Casio CZ-1

Back in 1986, this synth pioneered phase distortion synthesis in a full-sized keyboard format, delivering those signature glassy, metallic tones that defined so much 80s pop and still cut through modern mixes today.

At its core, it packs 16-voice polyphony with dual digitally controlled oscillators per voice and incredibly flexible 8-stage envelopes for sculpting everything from punchy basses to ethereal pads. The 61-note velocity-sensitive keyboard with monophonic aftertouch and a modulation wheel brings real expressiveness, while split and layer modes plus multitimbrality let you stack sounds creatively. Controls are straightforward with dedicated sliders and buttons for editing, onboard stereo chorus adds lush depth, and full MIDI In/Out/Thru plus 64 presets, 64 user patches, and cartridge expansion keep it versatile. Measuring about 40 inches wide and weighing 13kg, it's a sturdy stage beast with headphone out, sustain pedal input, and adjustable glide.

Players love its unique voice—distinct from FM synths like the DX7 but every bit as tweakable—and the user-friendly interface that makes deep edits approachable. It's held up as the top performer in Casio's CZ lineup, especially live, though some note the non-weighted keys and lack of a built-in sequencer as trade-offs for its era.