Roland Juno-106

The Roland Juno-106 is one of the best-selling and most widely used analog synthesizers of all time. Released in 1984, it was Roland's first MIDI-equipped polysynth and offered six voices of warm, immediate analog sound with a simple interface that anyone could learn in minutes. Its lush chorus effect, fat basses, and silky pads have appeared on countless records across pop, house, techno, synthwave, and virtually every other genre. Decades later, the Juno-106 remains one of the most sought-after vintage synths on the used market.

Sound and Architecture

Each of the Juno-106's six voices features a single DCO (Digitally Controlled Oscillator) — not a traditional VCO, which is why the Juno-106 stays in tune where older analogs drift. The DCO offers pulse wave (with variable pulse width), sawtooth, a square sub-oscillator one octave below, and white noise, all of which can be mixed together. The signal feeds into a 24dB/octave low-pass filter based on the Roland IR3109 chip, with resonance that self-oscillates, plus a non-resonant high-pass filter. A single ADSR envelope controls the filter, and a separate gate/ADSR controls the amplifier.

The Chorus

The Juno-106's BBD analog chorus is arguably its most famous feature. Two settings (Chorus I and II) can be used individually or stacked together for a rich, shimmering stereo spread that transforms even simple patches into something lush and wide. The chorus is the secret weapon behind the "Juno sound" — it is so iconic that it has been sampled, modelled, and cloned more than almost any other single effect in synthesis history.

Interface and MIDI

The front panel is a masterclass in simplicity — one slider or switch per function, no menus, no pages. What you see is what you get, making the Juno-106 one of the fastest synths to program from scratch. It stores 128 patches in RAM with full MIDI implementation including SysEx dumps, making it easy to back up and share patches. The Juno-106 was one of the first synths to offer proper MIDI, which contributed to its widespread adoption in studios.

Common Issues

The Juno-106's Achilles' heel is the 80017A voice chip. These custom Roland ICs handle the envelope generator and VCA for each voice, and they are prone to failure — the epoxy coating degrades over time and causes voices to drop out, distort, or go silent. Replacement chips (both NOS and modern clones from Analogue Renaissance and others) are available, and a full re-chip is a common service. When buying used, always test all six voices individually.

Who Is This For?

• Producers and songwriters who want instant, beautiful analog pads and basses with zero learning curve
• Live performers who need a reliable, hands-on polysynth with MIDI
• Vintage synth collectors after one of the defining instruments of the 1980s
• House and techno artists looking for the classic Juno chord stabs and bass sounds

The Juno-106 is a relatively affordable entry into high-quality vintage analog synthesis, though prices have climbed steadily. Always check the voice chips before buying — a unit with all six voices working cleanly is worth significantly more than one with failing chips. If the vintage price is too steep, the Roland JU-06A Boutique module and Roland Cloud Juno-106 plugin faithfully recreate the sound.