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Oscillators
Advanced features
To complement the front panel controls in the Oscillator section
there are many other parameters located in the Oscillators
menu - KEY 7
Setting the Oscillators to play in Unison
Unison mode allows more than one voice to be used for each
note played. This effect is useful when a very thick sound is
required. The A-Station allows up to eight voices to sound lay-
ered one on top of another when just a single note is played.
To listen to the effect, ensure the function switch is set to
SHIFT. Press KEY 7 and the display shows
u n
(Unison
Number) and an alternating value. Turn the PORTA/DATA knob
clockwise until the display shows
2
. Play a note and listen to
the sound. It will become thicker sounding. Increasing the num-
ber of notes to a maximum of 8 will result in very dense sound-
ing textures. NOTE: As voices are used, the polyphony will
reduce, for example using 8 voices in Unison mode will result in
just one note of polyphony!
Unison Detune Amount
Unison Detune Amount is used in conjunction with Unison
mode as described above. When using more than one voice
per note the Unison detune amount sets how much each voice
is detuned relative to the others. Adjust the amount until the
desired effect is heard.
VCO Drift
Controls the amount of tuning drift for the Oscillators. Setting a
modest value, 10 for example will cause each Oscillator to
slowly drift fractionally out of tune. Classic Analogue
Synthesizers were known to gradually go out of tune as the
internal circuits heated up. This helped to give them there own
unique character.
Oscillator Preglide
A Preglide is applied to the pitch of the Oscillators starting at a
pitch determined by the Preglide amount in semitones. Gliding
up from a pitch occurs when the display indicates between
.12 -
1
(minus 12 to minus 1 semitones) and gliding down from a
pitch occurs when the display indicates 1 - 12. (plus 1 to plus
12 semitones) The time it takes to complete the Glide is deter-
mined by the Portamento time knob on the front panel. The
Preglide is triggered with every note received.
Key 7
Function Alternating LED Display
1st Press Unison
u n
o F - 8
2nd
Unison Detune
u d
0 - 27.
3rd
VCO Drift
d r
0 - 27.
4th
Osc 1,2,3 Preglide
P g
12. - 12
5th
Oscillator Start Phase
o P
o F - 14
6th
Osc 2 - 3 FM Manual Level
F L
0 - 27.
7th
Osc 2 - 3 FM Env Amt
F E
64. - 63
8th
FM Env Attack
F A
0 - 27.
9th
FM Env Decay
F d
0 - 27.
10th
Oscillator Menu
Oscillators