The Pioneer TORAIZ AS-1 is one of the most surprising instruments I’ve ever reviewed. On paper, it’s “just” a mono synthesizer released under the Pioneer DJ brand. But under the hood, it carries something far more special — the single-voice architecture of the legendary Sequential Prophet-6, one of the most loved modern analog polysynths ever made. This makes it a perfect subject for a detailed Pioneer TORAIZ AS-1 Review.
Even though the Prophet-6 is still in production today, it already holds an iconic status. Its thick oscillators, rich filter, and unmistakable Sequential tone make it a staple in countless professional studios. And the fact that the AS-1 essentially gives you one complete Prophet-6 voice in a compact desktop form makes it a hidden gem many producers overlook.
So why isn’t it more popular? Probably because people assume “Pioneer = DJ gear” and don’t expect a world-class analog synth inside. But trust me — if this unit said Sequential on the front instead of Pioneer, it would be on every “best monosynth” list.
Build & Interface – Simple, Clear, and Performance-Focused
The interface of the AS-1 is minimalistic but well thought out.
It’s clear, fast, and performance-oriented, even if it’s not as deep as a classic knob-per-function monosynth.
What you get:
Dedicated knobs for the essentials
Touchstrip with excellent real-time performance options
Fast preset browsing
A surprisingly deep modulation system accessed through menus
Is it limited? A bit.
Is it frustrating? Surprisingly — not really.
Everything essential is accessible, and this instrument was clearly designed to be played, not endlessly menu-dived.
Sound – Thick, Bold, and Very Sequential
This is where the TORAIZ AS-1 destroys expectations.
The sound is huge.
Warm, rich, bold, and unmistakably Sequential.
It carries the exact same sonic DNA as the Prophet-6:
Fat oscillators
Creamy yet powerful filter
Big low-end
Warm mid-range harmonics
That “expensive” analog character you can’t fake
But there’s a catch:
Just like the Prophet-6, the AS-1 takes up a lot of energy in the mix.
Its tone is so full that you often need to carve space aggressively or design the patch more carefully.
But if you spend a moment shaping it or processing it with saturation, compression, or filtering, you’ll get incredibly thick, satisfying, and expressive analog tones.
Live Performance – A Secret Weapon on Stage
Where the AS-1 truly shines is live performance.
Compact
Solid
Fast to tweak
Huge sound
If you want strong analog bass, acid-like sequences, Prophet-style leads, or warm mono textures on stage, this instrument is perfect.
The touch strip + real-time modulation makes it extremely expressive in a live context.
In the Studio – Use an Editor for the Best Experience
Because of the compact interface, programming deeper patches directly on the unit can feel limited.
That’s where the SoundTower TORAIZ AS-1 Editor becomes essential:
The editor unlocks the full modulation matrix, gives you visual control over envelopes, LFOs, and effects, and makes patch design faster and more enjoyable.
I strongly recommend it to anyone using the AS-1 in a studio environment.
Sound Demos – Pioneer TORAIZ AS-1 Review
If you want to hear what the TORAIZ AS-1 can really do, check out this long-form demo:
My Custom Presets for TORAIZ AS-1
I’ve created a full collection of custom presets for the TORAIZ AS-1 — focused on deep basses, melodic sequences, leads, pads (via external FX), and textured analog tones.
These presets will help you unlock the full potential of its Prophet-6 engine.
Final Thoughts — A Mono Prophet-6 for a Fraction of the Price
The Pioneer TORAIZ AS-1 is one of the most underrated analog monosynths ever released.
✔ Same voice architecture as the Sequential Prophet-6
✔ Beautiful, rich, unmistakable analog tone
✔ Compact and powerful
✔ Great for live performance
✔ Excellent with an external editor
If you love the Sequential sound but don’t need a full polysynth — or want that character as a dedicated mono voice — the AS-1 is absolutely worth considering.
It may not have the knob-per-function interface many monosynths offer, but the sound alone justifies everything.
A powerful, expressive, and often overlooked analog instrument.
