1
Program mode: HD-1
HD-1 Overview
The HD-1 High Definition Synthesizer is Korg’s new
flagship PCM synthesis engine, featuring outstanding
sound quality, unique sound-design tools, and a rich
array of modulation possibilities, including:
• Ultra-high-quality sample interpolation, based on
new, proprietary technology, for minimal aliasing
and crystal-clear high frequencies
• Over a gigabyte of ROM and EXs sample libraries,
using only uncompressed PCM
• Dual-OSC structure, providing two complete voice
chains for layers and splits
• Within each OSC, up to four-way velocity splits
and crossfades (including two-way layers)
• Wave Sequencing, for creating rhythmic patterns or
complex, evolving timbres
• Vector Synthesis
• Dual multi-mode resonant filters
• Drive and Low Boost, for adding per-voice grit,
girth and distortion
• Three envelopes, two LFOs, and two AMS Mixers
per OSC, plus a common LFO, Vector envelope,
and KARMA for the Program as a whole
• Two complex key tracking generators per OSC,
plus two more for the Program as a whole
• Extensive real-time modulation capabilities
OSC2
OSC1
Common
LFO
HD-1 Program Structure
Vector
OSC1
OSC2
KARMA
Effects
Mixer
& EQ
2
Key
Track 1
Filter B
Pitch EG Filter EG
LFO 1 LFO 2
AMS
Mixer 1
AMS
Mixer 2
Filter
Key Track
Amp
Key Track
Amp
EG
HD-1 OSC Structure
Osc
Serial/
Parallel
Serial/
Parallel
Filter A
Drive Amp
+
