The Korg GS1-88 Grandstage is a professional 88-key stage piano designed for live performance, studio work, and expressive playing. It features Korg’s high-end RH3 hammer-action keybed for a realistic piano feel and includes seven powerful sound engines that deliver acoustic pianos, electric pianos, organs, analog-style synths, and PCM instruments.

Its interface is performance-oriented, with real-time controls, a dynamics knob to adjust touch response, and dedicated “Favorites” buttons for instant sound recall. Smooth Sound Transition ensures seamless changes between patches without audio dropouts. The Grandstage is built with premium materials, includes balanced outputs and USB/MIDI connectivity, and comes with a damper pedal, music rest, and stand. 

Key Features

1. Seven Sound Engines

• Acoustic grand/upright pianos

• Vintage electric pianos

• Three organ models

• Analog-modeling synth engine

• PCM-based sound engine

2. High-Quality Keybed

• 88 keys

• Real Weighted Hammer Action 3 (RH3)

• Velocity-sensitive for expressive performance

3. Performance Controls

• Dynamics knob for touch-response shaping

• Favorites banks for fast sound selection

• Smooth Sound Transition (SST) for seamless patch switching

4. Built-In Effects

• 3-band EQ

• Insert effects

• Reverb and delay options

5. Layering and Splitting

• Two performance sections that can be layered or split

• Easy panel controls for live flexibility

6. Stage-Ready Design

• Aluminum front panel with high visibility

• Backlit KORG logo and wood-grain rear panel

• Durable construction, made for touring

7. Connectivity

• Balanced XLR outputs

• 1/4″ outputs

• Headphone jack

• USB for MIDI and external media

• MIDI In/Out

8. Included Accessories

• Damper pedal with half-pedaling support

• Music rest

• Keyboard stand

• Power cable

9. Internal Memory and Sounds

• Large PCM storage

• About 500 factory presets