KORG EPS-1

Architecture

The Korg EPS-1, released in 1983, features a hybrid architecture, combining digital and analog elements:

• Type: Hybrid (Digital/Analog)
• Sound Generation: AI Synthesis System (Advanced Integrated Synthesis)
• Polyphony: 64 voices

Synthesis Types

• Electronic Piano: Digital samples or synthesis for piano sounds
• String Ensemble: Likely based on divide-down oscillator technology with analog filters
• Synthesizer: Basic subtractive synthesis capabilities

Key Synthesis Features

• Oscillators: Digital for piano sounds, analog divide-down for strings
• Filters: Analog filters for shaping the sound
• Envelopes: Digital envelope generators for amplitude and possibly filter control
• LFO: For modulation effects (details not specified)
• Effects: Digital effects processing (4 insert effects, 2 master effects)

Unique Aspects

• Velocity Sensitive Strings: Possibly the first ensemble with dynamic articulation of string sounds
• AI Synthesis: Korg’s proprietary synthesis system, likely combining sampling and synthesis techniques

The EPS-1 represents a transition period in synthesizer technology, blending digital sound generation with analog sound shaping. Its hybrid architecture allowed it to produce realistic piano sounds alongside classic string ensemble tones and basic synthesizer patches.