How to Create a Piano Sound on the Yamaha DX reface

The Yamaha DX reface is an FM synthesizer, so its piano sounds are based on harmonics and dynamics, not samples. A good FM piano relies on:

• a strong fundamental tone
• a brighter, percussive attack
• velocity sensitivity
• controlled envelopes

This approach works perfectly for pop, funk, jazz, hip-hop, 80s music, and synth-based tracks.

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1. Choose a Suitable Algorithm

Start with an algorithm that has:

• At least one carrier
• One or two modulators feeding that carrier

Best choice:

• A simple vertical stack (Modulator → Carrier)
• Optional second modulator for attack brightness

Avoid very complex algorithms at first.

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2. Set Operator Ratios (Core Piano Tone)

Carrier (Main Body)

• Ratio: 1.00
  This provides the fundamental pitch.

Modulator (Brightness)

• Ratio: 2.00 or 3.00
  These ratios create musically related harmonics.

Optional:

• A second modulator at 4.00 for extra attack sparkle.

Rule of thumb:

• Lower ratios = warmer
• Higher ratios = brighter and harder

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3. Operator Levels (Attack vs Body)

A piano has:

• a bright initial hit
• a softer sustain

Set levels accordingly:

• Carrier Level: High and stable
• Modulator Level: Medium, but shaped by envelope

The modulator should be strong at note start, then fade quickly.

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4. Program the Envelopes (Very Important)

Carrier Envelope (Sustain)

• Attack: Fast
• Decay: Medium
• Sustain: Medium–High
• Release: Medium

This creates the ringing body of the piano.

Modulator Envelope (Hammer Attack)

• Attack: Fast
• Decay: Short
• Sustain: Low or 0
• Release: Short

This simulates the hammer strike and initial brightness.

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5. Velocity Sensitivity (Essential)

A piano must respond to how hard you play.

• Velocity → Modulator Level: Medium to High
• Velocity → Carrier Level: Low to Medium

Result:

• Soft playing = warm, mellow tone
• Hard playing = brighter, more percussive sound

Without velocity, the sound will feel lifeless.

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6. Feedback (Use Carefully)

• Apply feedback to a modulator only
• Keep it low

Feedback adds realism and complexity, but too much makes the sound metallic.

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7. Fine Tuning

• Slightly detune carriers if you use more than one
• Keep the sound clean—avoid extreme settings
• Adjust decay time depending on tempo and style

Shorter decay = pop / funk
Longer decay = ballads / ambient

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8. Effects (Classic DX Style)

Chorus

• Slow rate
• Medium depth
• Adds width and richness

Reverb

• Small hall or plate
• Medium decay
• Low to medium mix (15–30%)

Avoid heavy effects—the piano should stay clear.

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9. Playing Tips

• Best range: C2–C6
• Play chords and broken chords
• Avoid glide or vibrato
• Let notes overlap naturally

FM pianos shine when played dynamically.

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Quick Variations

Bright Pop Piano

• Modulator Ratio → 3.00
• Higher modulator level
• Shorter decay

Warm Ballad Piano

• Modulator Ratio → 2.00
• Lower modulator level
• Longer release

Lo-Fi / Hip-Hop Piano

• Lower modulator level
• Slight detune
• More reverb

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Common Mistakes to Avoid

❌ Too much feedback
❌ Very long sustain
❌ No velocity sensitivity
❌ Overly complex algorithms

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Final Tip

If you remember one thing:

An FM piano is about dynamic contrast, not realism.

Get the attack right, shape the decay, and let velocity do the work.

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This method will give you a solid, musical FM piano sound on the Yamaha DX reface that works beautifully in many styles.