KORG Audio Gallery AG-10
ai2 PCM synthesizer



About

KORG Audio Gallery AG-10 is the lowest-end model of ai2 (ai square) synthesis series, started with 01/W.

I made an editor for AG-10 with Emagic SoundDiver. This editor can use AG-10's hidden waveforms and new synthetic function.
See the link below for downloads and sound examples.


KORG AG-10 (1991)

CONTENTS:
AG-10 overview
The hidden Loop Modulation
Editor for Emagic SoundDiver
AG-10 .mp3 sound demo
Related models
Links

Overview

A simple PCM synthesizer: 2 pair of OSC-Filter-Amp. KORG calls it ai2 (ai square) synthesis.
32-polyphonic, 4MB PCM ROM. The waveforms are basically GM-oriented, but some are inherited from1/
01/W and M1.
The filter has no resonance, as is the case with all ai/ai2 synths. High frequencies can be very subtly emphasized by using 'VDF Color', called 'Emphasis' in other models.
3 envelopes for pitch, filter and amp. The envelope speed is not fast.
2 FX - chorus and reverb.

The Hidden Loop Modulation

I found some hidden waveforms, using a new editor. A new interesting waveform modulation - I call it ILM (Interactive Loop Modulation) - is possible by using the hidden waves.
Various bits of samples are played back at random. It sounds like digital noise made by 'Jam loops', circuit-bending, ring modulation, aliasing and OSC-to-OSC crosstalk.
Sample start point and the pitch parameters add unexpected effects.
ILM works as if OSC1 modulates OSC2, and vice versa. As AG-10 seems to scratch the loop points affected by the other OSC settings, I call it Interactive Loop Modulation.
ILM sounds like Roland D-50 /
D-110, Ensoniq VFX / SQ-R and Emu Morpheus. Also Roland D-70's DLM (Differential Loop Modulation) - noisy granular loop scratching - may be related.

Editor for Emagic SoundDiver

AG-10 adaptation is an editor made with Emagic SoundDiver.
Download AG-10 editor (12KB). See the readme file for details.


AG-10 editor screenshot

AG-10 .mp3 Sound Demo

Here are examples of the sounds made with AG-10. All sounds are recorded without any effects, external or internal.

All sounds are dual-layered to add chorus effect, by setting the same sound in two MIDI channels.

Jam Loops by ILM: Interactive Loop Modulation
Piano and other samples scratched (292KB)
Jam Loop Pad (240KB)
Some Jam Loop's pitch is fixed (172KB)
The start point varies randomly (104KB)
Start/Loop point fluctuation (92KB)

More ILM: Various Modulation
'Syn Mallet' modulated with digital distortion (208KB)
Saw wave with distortion modulation (112KB)
Strings with noises (244KB)
Alias noise added and pitch randomized (156KB)
Xmod bells 1 (160KB)
Xmod bells 2 (240KB)

Typical ai2 PCM sounds
Choir pad (296KB)
analog pad (264KB)
Pluck samples (108KB)
01/W's 'Ether Bell' (284KB)
PCM attack 1 (104KB)
PCM attack 2 (104KB)

Synthetic functions
The envelope at the fastest (120KB)
Velocity with ILM (240KB)
VDF color velocity: subtle difference (172KB)

Related Models

01/W: ai2 synthesis
KORG released
01/W in 1991 as the next generation of M1's ai synthesis. The synthesis engine is called ai2 (ai square).
01/W has 32-poly, 6MB engine with the new non-linear function called Wave Shaping. Wave Shaping distorts the waveform and it can be used to emulate distortion, resonance, etc. To me it's like YAMAHA SY99's Fixed Frequency RCM (sample FM) and CASIO VZ's iPD (interactive Phase Distortion). Filter emphasis/color is also added in ai2 synths.

KORG 01/W
KORG 01/W (1991)

Other ai2 synths
KORG released various versions of ai2 synths, discarding Wave Shaping and adding GM compatibility instead. Later models have 64 polyphony. For info about other models, see 03R/W, 05R/W, and NS5R pages. No other modules seem to have AG-10's ILM function.
The half rack module 05R/W is the closest brother of AG-10. 05R/W has 6MB ROM and 2 multi-effects.


KORG 05R/W (1993)

The synth engine chip MBCS35104
KORG and other companies made Waveblaster daughterboards with AG-10's sound chip MBCS35104.


KORG MBCS35104

Links

KORG USA X5DR manual in the download section would be of some help
Korgy Park Info about related models 05R/W & X5





Deep Synthesis: Home

3. 1. 2004
5. 5. 2007 design updated