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Yamaha S90 ES

88-key Synthesizer with 53MB Stereo Piano Sample, Motif ES Voices, Internal Effects, and Balanced Hammer Action
Item ID: S90es
Sorry, the Yamaha S90 ES is no longer available. We've left this page up for reference only.
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Yamaha S90 ES
Yamaha S90 ES

WOW! A Musical Synthesizer for Every Walk of Life!

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The Yamaha S90 ES combines a stunningly natural acoustic piano sound with all the sonic flexibility of the award winning Motif ES. A new multi-velocity, stereo grand piano sample, the new sound board simulation and the half-damper capability (when used with the Yamaha FC3) all ensure a rich and realistic acoustic piano sound. The 128-note polyphony tone generator, Studio Connections compatibility, mLAN expansion slot, and PLG expandability give it all the synthesis power and control capabilities of the Motif ES line. The S90 ES is great for stage or studio!

Yamaha S90 ES Music Synthesizer at a Glance:
  • The perfect balance of synthesizer and piano!
  • The most expressive piano voice available in a synth
  • Half-damper capability for ultimate creative options
  • Powerful synth engine with Motif ES sounds
  • 88-key balanced hammer action for great playing feel
  • Use it as a plug-in with Cubase or Nuendo, and control DAW parameters
  • Easy computer editing interface and mLAN connectivity

The perfect balance of synthesizer and piano!
Is the S90 ES an 88-note weighted action digital piano with the sonic flexibility of a synth or a synthesizer with the best sounding piano samples ever available? Actually, its the perfect balance of both. The new multi-velocity stereo samples of Yamaha's hand-built S700 grand piano, the damper reverb effects, and half damper capability all ensure the S90 ES has the most expressive acoustic piano sound Yamaha has ever offered in a synthesizer. The 128-note polyphony tone generator based on the award winning Motif ES (including 8 inserts, 2 system and separate mastering effects) and Studio Connections, mLAN, and PLG expandability give it all the sonic power and control flexibility of our Motif ES workstation lineup.

The most expressive piano voice available in a synth
In designing the S90 ES's new grand piano voice, the focus was in creating a voice that produces naturally sounding long tones even when played at a pianissimo level. To realize this goal, a generous 53MB of memory was dedicated to this voice to use longer samples of a specially selected S700 grand piano - a $250,000 acoustic grand handcrafted by Yamaha's master artisans. Played at normal tempos and dynamic levels the sound of this voice is truly superb, but its at the opposite end of the tempo and dynamic range that the results are most stunning. The longer waves give each note a very natural sustain that, when used on ballads and slow, exposed pieces, plays expressively with a full, natural sound.

This voice also features stretch tuning and a damper resonance effect, which bring this voice even closer to reality by simulating the inner workings of an acoustic grand piano. Damper resonance simulates the resonance of the strings and soundboard when the damper pedal is pressed - a factor that contributes to the unique sound of a grand piano. Using the sustain pedal on soft, slow pieces it adds a rich resonance to the pianos tone and enhances its natural sustain and decay.

Half-damper capability for ultimate creative options
Some classic pieces call for a half damper technique, where the damper pedal is pressed half way down raising the felts only partially off the strings. As the sustain function on most synths is a simple on/off operation, such use is normally unavailable. The S90 ES however, is able to respond to small changes in the FC-3 foot controllers pedal position due to its half damper capability. This gives the performer greater control over the muting by the damper, and expressive freedom to create the subtle nuances required by the music.
Tone Generation Derived From the Motif ES

Powerful synth engine with Motif ES sounds
Using a powerful new tone generator derived from the Motif ES, the S90 ES produces voices with stunning clarity and great response that heightens the musical experience for both you and your listeners. To meet the needs of today's players its 228MB of wave memory holds an enormous library of expressive voices and drum kits, many of which come from the Motif ES, that cover everything from acoustic pianos and orchestra to cutting-edge hip-hop and electronica.

88-key balanced hammer action for great playing feel
An 88-note weighted action keyboard based on Yamaha's acoustic piano designs offers players a feel that is natural, smooth, and responsive, especially on keyboard voices like the acoustic grands and electric grands. For its non-keyboard instruments like basses, drums and percussion, which require slightly varied playing styles, the action is evenly balanced from top to bottom to make these instruments feel and play more responsively. Aftertouch is also included so you can gain more expression from every note.

New signal processing effects system
The S90 ES takes great advantage of the processing power inherited from the Motif ES to produce effects like damper resonance, reverb and others with stunning clarity. This power also satisfies users of its multi-timbral capabilities, allowing liberal application of effects without the restraints experienced in lesser designs.

The system is designed with two blocks of insertion effects (117 types) for each voice and two overall system effects that include 20 reverb types and 49 chorus/delay effects. This way you can apply the right type of signal processing where its needed most. Even in song or pattern modes you wont feel confined since voice insertion effects can be applied on up to eight individual parts simultaneously. Further sound tailoring is available with three-band individual part EQ settings, eight types of mastering effects, and a five-band master EQ.

Use it as a plug-in with Cubase or Nuendo, and control DAW parameters
Compatibility with Studio Connections lets the S90 ES function as if it were a plugin within compatible DAW applications like Cubase and Nuendo. Hardware and software systems integrate seamlessly in this environment where total recall of entire hardware/software systems is possible. In other DAW systems, the S90 ESs sliders, knobs and data dial can be used to control start/stop of record or playback, track volumes, panning and more to increase system efficiency.

Easy computer editing interface and mLAN connectivity
The graphic user interface of the S90 ES dedicated voice editing application lets you edit and create your own voices with point and click convenience. Up-to-date applications and USB drivers are available for download at www.yamahasynth.com. If you want to connect the S90 ES to an mLAN network just install an optional mLAN expansion board and start sharing MIDI data and multiple channels of 24-bit/96kHz digital audio with other mLAN equipped devices and computers through an IEEE1394 Firewire cable.

Powerful arpeggiator delivers real-time performance with a human touch
The S90 ES arpeggiator is a powerful real-time performance tool that can be used in combination with Mega Voices to create remarkably realistic instrumental performances. Call up a guitar voice, for example, play a chord, and the S90 ES delivers a performance complete with hammer-ons, pull-offs, harmonics, slides, even fret noise. A library of 1787 phrases offers everything from popular phrases to the latest cutting edge rhythms. With S90 ES drum kits the arpeggiator generates innovative rhythm patterns, while with normal voices its chord recognition capabilities produce pitched phrases. For fuller accompaniments use a split voice to create two part accompaniments - bass phrases from lower keys and chords or melodies from mid and high range keys - that are great for backing vocals or instrument solos.

Modular synthesis plug-in expandability
The Yamaha S90 ES delivers a lot of impressive features and sound on its own, but if you want to expand its capabilities its Modular Plug-in System lets you add the sounds you need with easy to install expansion boards. Add the legendary sounds of the DX7 or the warm punch of an analog synth. Each expansion board has its own dedicated tone generator and polyphony so its almost like adding another synthesizer to your system without losing any of the S90 ES's onboard voices.

Yamaha S90 ES Music Synthesizer Features:
  • 88-key balanced hammer action with aftertouch
  • Complete MOTIF ES wave ROM, plus 53MB of a stunning 3-layer stereo sample of the S700 acoustic piano
  • Soundboard simulation effect
  • 128-note polyphony
  • Eight parts with dual insert effects
  • System reverb and chorus
  • Mastering effects and master EQ
  • USB to-host and to-device connectivity
  • MIDI master keyboard functions
  • Full-function remote control for DAW/VST software
  • Half-damper capability (requires FC3 pedal)
  • 3 PLG expansion slots
  • Optional mLAN16E card to turn your S90 ES into a multi-channel ASIO audio/MIDI interface
For the best of piano and synth sounds, choose the Yamaha S90 ES!

Warranty Info

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Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

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