Best Synthesizer with Arpeggiator (2026): 5 Picks Compared

Updated Nov 11, 2026 · By Jonah Mercer · Ranked from listed specifications · How we rank

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The Korg microKORG leads this list for a synthesizer with an arpeggiator: a 6-step arpeggiator, 37 full-size keys and a built-in vocoder at 8.4 lb. If you want a longer arpeggiator pattern, the Korg KingKORG NEO offers 8 steps, and the MOOG Grandmother pairs its arpeggiator with a 256-note sequencer.

The picks at a glance

#	Pick	Product
1	Best Overall	Korg microKORG Compact Analog Modeling Synthesizer w/Vocoder	Check on Amazon
2	Runner-Up	MOOG Grandmother Semi-Modular Analog Synthesizer	Check on Amazon
3	Also Great	IK Multimedia UNO Synth Pro 3 oscillator	Check on Amazon
4	Also Great	Korg KingKORG NEO Synthesizer w/ 24 Voices	Check on Amazon
5	Also Great	Sequential Oberheim TEO-5 5-Voice 44-Key Analog Synthesizer Keyboard	Check on Amazon

Which one should you buy?

Players who want a 6-step arpeggiator with 37 full-size keys: Korg microKORG Compact Analog Modeling Synthesizer w/Vocoder See pick 1More picks: Best 37 Key Synthesizer
Players who want a 256-note sequencer and spring reverb: MOOG Grandmother Semi-Modular Analog Synthesizer See pick 2
Players who want a 64-step sequencer and 256 presets: IK Multimedia UNO Synth Pro 3 oscillator See pick 3
Players who want 138 oscillator types and 18 filters: Korg KingKORG NEO Synthesizer w/ 24 Voices See pick 4
Players who want 44 velocity-sensitive keys with aftertouch: Sequential Oberheim TEO-5 5-Voice 44-Key Analog Synthesizer Keyboard See pick 5

Want the full range? Best Synthesizer ranks the top synthesizers for every buyer, or browse all 36 guides.

The 5 picks, ranked

1Best Overall

Korg microKORG Compact Analog Modeling Synthesizer w/Vocoder

Keys: 37
Max polyphony: 4
Analog engine not stated in the listing
USB-MIDI
1-year warranty stated

9.8Spec score View on Amazon

It earns Best Overall with a 6-step arpeggiator, 37 full-size keys, a built-in vocoder and 4-voice polyphony.

Who it suits

Players who want a 6-step arpeggiator with 37 full-size keys
Players who want a built-in vocoder and a mini mic

Skip it if

You want more than 4 voices of polyphony
You want more than 37 keys

The microKORG ships with a mini mic for the built-in vocoder and a built-in speaker for quick practice sessions. It has 37 full-size keys, dedicated knobs and buttons for sound editing, and MIDI connectivity for other music gear. The XMT Sound Engine covers analog modeling synthesis with a diverse selection of waveforms and presets.

2Runner-Up

MOOG Grandmother Semi-Modular Analog Synthesizer

Keys: 32
Max polyphony not stated in the listing
Analog engine
USB-MIDI
1-year warranty stated

9.5Spec score View on Amazon

It earns Runner-Up with a built-in arpeggiator, a 256-note sequencer, 32 velocity-sensitive keys and a spring reverb tank.

Who it suits

Players who want a 256-note sequencer and spring reverb
Players who want 41 modular patch points

Skip it if

You want more than 32 keys
You want polyphony beyond one voice

The Grandmother is a monophonic semi-modular analog synthesizer with 32 velocity-sensitive full-size keys. It has a built-in arpeggiator, a 256-note sequencer with three sequence files, and a spring reverb tank that can process external sounds. Connections include 1/4-inch audio in, 1/4-inch TRS audio out, 5-pin DIN MIDI in, out and thru, and MIDI over USB.

3Also Great

IK Multimedia UNO Synth Pro 3 oscillator

Keys: 37
Max polyphony not stated in the listing
Analog engine
USB-MIDI
2-year warranty stated

9.3Spec score View on Amazon

It earns Also Great with a 64-step sequencer, an arpeggiator, 3 wave-morphing oscillators and 256 presets.

Who it suits

Players who want a 64-step sequencer and 256 presets
Players who want a weighted FATAR keybed

Skip it if

You want more than 37 keys
You want more than 3 oscillators

The UNO Synth Pro is a monophonic analog synthesizer with 3 wave-morphing oscillators, a dual filter and a 37-key weighted FATAR keybed. It has an arpeggiator, a 64-step sequencer, an audio input and full USB, MIDI and CV controls. It comes with 256 presets and an editor app for sound design and preset management on Mac and PC.

4Also Great

Korg KingKORG NEO Synthesizer w/ 24 Voices

Keys: 37
Max polyphony: 4
Analog engine
Presets / patterns: 200
USB-MIDI not stated in the listing
1-year warranty stated

9.2Spec score View on Amazon

It earns Also Great with an 8-step arpeggiator, 24-voice polyphony, a 16-band vocoder and 200 presets.

Who it suits

Players who want 138 oscillator types and 18 filters
Players who want 24-voice polyphony and 37 keys

Skip it if

You want more than 37 keys
You want more than 24 voices

The KingKORG NEO has 37 full-size velocity-sensitive keys, oscillators with 138 types and 18 filters. It offers 24-voice polyphony, an 8-step arpeggiator and a 16-band vocoder with formant shift and hold. Programs include 300 programs with 200 presets and 100 user slots, plus split and layer functions for two timbres.

5Also Great

Sequential Oberheim TEO-5 5-Voice 44-Key Analog Synthesizer Keyboard

Keys not stated in the listing
Max polyphony not stated in the listing
Analog engine

9.0Spec score View on Amazon

It earns Also Great with a multimode arpeggiator, a 64-step polyphonic sequencer, 44 keys and 5 analog voices.

Who it suits

Players who want 44 velocity-sensitive keys with aftertouch
Players who want a 19-route modulation matrix

Skip it if

You want more than 44 keys
You want more than 5 voices

The TEO-5 has 5 analog voices with 2 voltage controlled oscillators per voice and a classic SEM filter. It has a 64-step polyphonic sequencer, a multimode arpeggiator, dual effects and analog overdrive. The 44-key Fatar keyboard has channel aftertouch, pitch and modulation wheels and octave transpose controls.

Side by side

Product	Keys	Max polyphony	Analog engine	Presets / patterns	USB-MIDI	Weight	Warranty
Korg microKORG Compact Analog Modeling Synthesizer w/Vocoder	37	4	Not stated	Not stated	Yes	8.4 lb	1-year
MOOG Grandmother Semi-Modular Analog Synthesizer	32	Not stated	Yes	Not stated	Yes	16 lb	1-year
IK Multimedia UNO Synth Pro 3 oscillator	37	Not stated	Yes	Not stated	Yes	Not stated	2-year
Korg KingKORG NEO Synthesizer w/ 24 Voices	37	4	Yes	200	Not stated	9.6 lb	1-year
Sequential Oberheim TEO-5 5-Voice 44-Key Analog Synthesizer Keyboard	Not stated	Not stated	Yes	Not stated	Not stated	20.9 lb	Not stated

How we ranked these synthesizers

Every pick ranks in Amazon's best-seller list for its category and has a listing with real specifications. The order mixes two things: how each model compares on the specs below (higher share of the best value in this group scores more), and how widely it is bought. The spec score runs from 9.0 to 9.8 and only compares these picks with each other. A spec the listing does not state is left out and the other specs are re-weighted; a listing with fewer than 2 stated specs is scored at half. We do not test gear in person. Full method.

Keys weight 2
Max polyphony weight 3
Analog engine weight 2
Presets / patterns weight 1
USB-MIDI weight 1

Buying advice: synthesizer with arpeggiator

Match the arpeggiator steps to your patterns

Arpeggiator steps set how long a pattern runs before it repeats. The microKORG runs 6 steps and the KingKORG NEO runs 8 steps, while the TEO-5 uses a multimode arpeggiator. For longer patterns, look at the sequencer too: the Grandmother has a 256-note sequencer and the UNO Synth Pro has a 64-step sequencer.

Count keys and voices before you choose

Keys decide how much of a part you can play at once, and voices decide how many notes sound together. The microKORG has 37 keys with 4 voices, the KingKORG NEO has 37 keys with 24 voices, the Grandmother has 32 keys and one voice, the UNO Synth Pro has 37 keys, and the TEO-5 has 44 keys with 5 voices.

Check the connections and the weight

Connections decide what the synthesizer plugs into. The microKORG, the Grandmother and the UNO Synth Pro use USB-MIDI, and the Grandmother adds 5-pin DIN MIDI in, out and thru. The UNO Synth Pro also takes CV and Gate. The microKORG weighs 8.4 lb, the KingKORG NEO weighs 9.6 lb and the TEO-5 weighs 20.9 lb, so compare the weights in the specs before you carry one.

Frequently asked questions

What does an arpeggiator do on a synthesizer?

An arpeggiator plays the notes of a held chord one at a time in a pattern, stepping through them at a set rate. The microKORG runs 6 steps and the KingKORG NEO runs 8 steps, so the step count sets the pattern length.

How many keys do these synthesizers have?

The TEO-5 has 44 keys, the microKORG, the KingKORG NEO and the UNO Synth Pro have 37 keys, and the Grandmother has 32 keys. The KingKORG NEO, the Grandmother and the TEO-5 have velocity-sensitive keys, and the UNO Synth Pro has a weighted FATAR keybed.

Do these synthesizers have a built-in sequencer?

The Grandmother has a 256-note sequencer, the UNO Synth Pro has a 64-step sequencer and the TEO-5 has a 64-step polyphonic sequencer.

What is the difference between 4 voices and 24 voices?

Voices set how many notes can sound at the same time. The microKORG has 4 voices and the KingKORG NEO has 24 voices, so the KingKORG NEO can sound more notes together before notes cut off.