Three synths for sustained chords

Audio Guru / Instruments

Extra voices let one chord fade while the next arrives; layers let a single performance combine different sounds.

Why these? We grouped these digital keyboards for sustained chords and rich textures, comparing a hands-on single sound, layered instruments and four-layer sound design.

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Which one fits?

GAIA 2 for direct controls; MODX M6 for piano and synth layers; multi/poly for four-layer motion.

Before you buy: Compare the actual patch and keyboard you need, not voice count alone.

Count the voices your patch uses

A four-note chord with a long release can overlap the next four-note chord: eight voices before unison or extra layers.

Try your actual layered patch, not just the maximum voice figure. multi/poly’s layers share voices; MODX M6 has separate limits for its three sound engines.

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Confirm model, condition and delivery country at the retailer; shared Amazon links may open the US store.

Roland Gaia 2

Choose if you want hands-on sound shaping

A digital synth with up to 22 voices, known for wavetable motion and hands-on controls, with digital multimode filters and a 37-key keyboard.

Pros

• Direct sound-shaping controls
• Responsive motion pad
• Useful onboard effects

Cons

• Some edits still need menus
• Keyboard has no aftertouch
• Chorus slot has limited choices

Owner feedback ↗

Learn more

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Yamaha MODX M6

Choose for piano and synth layers

A digital synth known for layered performances, with 128 sample-based, 128 FM and 12 virtual-analog voices in separate engines; it loads samples without sampling them.

Try a clear piano over a soft pad, then use the faders to keep the pad behind the melody.

Pros

• Easy to carry
• Broad, rich sound palette
• Useful Scenes and live controls

Cons

• Menus take practice
• No keyboard aftertouch
• Light key action will not suit everyone

Owner feedback ↗

Learn more

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Korg multi/poly

Choose if you want four layers with moving timbres

A digital synth with up to 60 voices, known for four-layer motion and modeled analog filters; it imports wavetables, not samples.

Pros

• Flexible four-layer sounds
• Expressive Kaoss gestures
• Wide range of filter models

Cons

• Deep edits need menus
• Three-octave keyboard limits range
• Effects settings can feel cryptic

Owner feedback ↗ · Owner feedback ↗

Learn more

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A few useful differences

Equipment	Maximum polyphony	Sound parts	Built-in keys	Filter choices
Roland GAIA 2	Up to 22; varies with settings	1	37 full-size	Digital low-, band- and high-pass
Yamaha MODX M6	128 AWM2 + 128 FM-X + 12 AN-X; separate engines	16 parts; up to 8 under keyboard control	61 semi-weighted; no aftertouch	Digital filters; engine dependent
Korg multi/poly	Up to 60; settings dependent	4 layers share voices	37 full-size	Dual digital modeled filters

Long fades, unison and layers use extra voices; Yamaha’s three engine limits are separate, not one pool available to every sound.

Sources & image credits

Roland Gaia 2 specifications · Manufacturer press image: Roland
Yamaha MODX M6 specifications · Manufacturer image permission: Yamaha

Pros and cons summarize selected owner reports, not our own testing or a consensus; fit and computer setup can change the experience.

Korg multi/poly specifications · Manufacturer image: Korg / Clyne Media

Digital engines, analog filters ↗Record your hardware synth ↗

Content updated Sep 23, 2026 · Updated the lineup, layering advice and images to match the Instagram comparison.