Alesis ANDROMEDA A6 Reference Manual page 117

SYNC Parameter: OSC 2 Only
Synchronizing OSC 1 with OSC 2
Even with the VCOs' fine tuning and ultra-fine tuning controls, it is impossible to
tune the VCOs to perfect unison, especially across the entire range of the A6's
keyboard or the wider range of MIDI Notes. There may be times when you need the
tuning of two VCOs to be locked to each other. This is where
forces the frequency of
SYNC
waves' phase – when the waves begin their rise and fall during their periodic cycles.
When two sound waves have their phases synchronized, their cycles begin at exactly
the same instant and stay locked throughout the cycle.
DISPLAY
PAGE PANEL LABEL
TUNE
SYNC
Button +
Two LEDs
Pressing the
press activates
turns
SYNC
The choices, in order, are
sync locks the phase relationship of
HARD
.
1 SOFT
. The audible difference between these two methods depends on the frequencies
OSC 1
of the VCOs before sync is activated.
When tuned to approximately the same frequency, there's not much (if any) audible
difference between hard and soft sync. What you'll experience is two VCOs tuned to
perfect (well, for all intents and purposes) unison. There may be a noticeable increase
in loudness – depending on which waveforms are selected – resulting from two
waves being "right on top of each other" (more accurately called "in phase" with
each other), and any beating from two oscillators in close frequency will disappear.
As the oscillators are tuned to wider intervals, the difference between
sync (or no sync, for that matter) becomes more obvious. If you tune
from
OSC 1
resulting from two fundamental waves – with significantly different frequencies –
being locked in phase: the waveforms start their cycles at the same time. Another set
of harmonics is created when
Since
OSC 1
the slaved oscillator (
to the difference between hard and soft sync in this situation. You might also want to
experiment with octave intervals and dissonant intervals as well.
A A6 R
NDROMEDA
OSC 2
PARAMETER
DISPLAY
SYNC
button rotates among three synchronizing possibilities: the first
SYNC
sync, the second press activates
HARD
off. You can also use soft knob
- OFF -
sync locks the phase relationships of
then turn sync on, for example, a new set of harmonics are created
HARD
SOFT
is the reference, try tuning
) being tuned below the reference oscillator (
OSC 2
M
EFERENCE ANUAL
Chapter 5: Oscillators and Filters
to match the frequency of
OPTIONS
or RANGE DESCRIPTION
OFF Turns the synchronization of
off. Both VCOs oscillate independently.
HARD Turns
HARD SYNC
SOFT Turns
SOFT SYNC
SOFT
when 's
7 OSC 2
, and .
SOFT HARD
's fundamental wave with that of
OSC 2
's harmonics with the harmonics of
OSC 2
sync is used.
up from
OSC 1 OSC 2
is used.
SYNC
by locking their
OSC 1
to
OSC 2
on. See description below.
on. See description below.
sync, and the third press
page is displayed.
TUNE
OSC
and
HARD SOFT
up a fifth
OSC 2
and listen to the result of
). Listen
OSC 1
OSC 1
115