poly 6

KORG POLY 6

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Korg in no way endorses this emulation of their classic synthesiser and have

their own emulation product that gives the features offered here. Korg,

Mono/Poly, Poly-6, MS-20, Vox and Continental are all registered names or

trademarks of Korg Inc of Japan.

Quite a few liberties were taken with this synth. There were extremely few

differences between the original and the Roland Juno 6, they both had one osc

with PWM and a suboscillator, one filter and envelope, a chorus effect, and

inevitably both competed for the same market space for their given price. To

differentiate this algorithm some alterations were made. There are two separate

envelopes rather than just one, but the option to have a gated amplifier is

still there. In addition glide and noise were added, both of which were not in

the original instrument. With respect to the original instrument this was

perhaps not a wise move, but there seemed little point in making another Juno

with a different layout. The net results is that the two synths do sound quite

different. The emulation does not have an arpeggiator.

Volume: Master volume of the instrument

Glide: length of portamento

Tune: Master tuning of instrument

Bend: Amount of pitch wheel that is applied to the oscillators frequency.

VCO section:

Octave: What octave the instrument's keyboard is in.

Wave: Waveform selection: Triangle, Saw, Pulse and Pulsewidth

PW PWM: Amount of Pulsewidth (when Pulse is selected) and Pulsewidth

Modulation (When Pulsewidth is selected).

Freq: Frequency of PW/PWM

OFF/SUB1/SUB2; Adds a square sub-oscillator either off, 1 or 2 octaves

down from a note.

MG (Modulation Group):

Freq: Frequency of LFO

Delay: Amount of time before the LFO affects the destination when a key

is pressed.

Level: How strongly the LFO affects the destination

VCO/VCF/VCA: Destinations that the LFO can go to:

VCO: The Voltage Controlled Oscillator:

Affects oscillator pitch, producing vibrato

VCF: The Voltage Controlled Filter:

Affects Filter, producing a wah effect

VCA: The Voltage Controlled Amplifier:

Affects the Amplifier, producing tremolo

VCF section:

Freq: Cut off frequency of the filter

Res: Resonance of the filter

Env: By how much the filter is affected by the envelope.

Kbd: How much Keyboard tracking is applied to the envelope. note:

A low setting doesn't allow the filter to open, making the notes

seem darker the further you go up the keyboard.

Hold: prevent key off events

Mono Mode: Gang all voices to a single 'fat' monophonic synthesiser.

Poly: One voice per note.

Envelope Section:

Top:

Filter envelope:

Attack: Amount of time it takes the filter to fully open.

A high value can produce a 'sweeping filter' effect.

Decay: Amount of time it takes for the filter to close to

the sustain level

Sustain: Amount of filter that is sustained when a key is held

Release: Amount of time it takes for the filter envelope to stop

affecting the filter. Combining a low filter release with a

high amplitude release time can cause an interesting effect.

Bottom:

Amplitude envelope:

Attack: Amount of time it takes for the signal to reach its peak.

Decay: Amount of time it takes for the signal to drop to the

sustain level

Sustain: How quickly the sound decays to silence.

Release: How long it takes the sound to decay to silence after

releasing a key.

VCA:

Env: When on, this causes the Amplitude envelope to affect the sound.

I.E, If you have a long attack time, you get a long attack time.

Gate: When on, this causes the Amplitude envelope only (not the filter

envelope) to be be bypassed.

Gain: Gain of signal.

Effects Section:

0: No effects

1: Soft Chorus

2: Phaser

3: Ensemble

Intensity: How much the effects affect the output.

There are some mildly anomolous effects possible from the MG section, especially

with the VCA. The MG and the env are summed into the VCA which means if the env

decays to zero then the LFO may end up pumping the volume, something that may

be unexpected. Similarly, if the LFO is pumping and the voice finally stops its

cycle then the closing gate may cause a pop on the MG signal. These can be

resolved however the current behavious is probably close to the original.

Bristol thanks Andrew Coughlan for patches, bug reports, this manual page and

diverse suggestions to help improve the application.

Korg in no way endorses this emulation of their classic synthesiser and have

their own emulation product that gives the features offered here. Korg,

Mono/Poly, Poly-6, MS-20, Vox and Continental are all registered names or

trademarks of Korg Inc of Japan.