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.