Alesis A6 User Manual
Chapter 10: Using Effects
A
NDROMEDA
A6 R
EFERENCE
M
ANUAL
209
The Diffusion parameter (soft knob
6
) sets how smooth the decay will be. Used in
conjunction with the Density parameter, it can be used to approximate hundreds of
room textures. Again, use the keyboard to check if the room is getting too ripply or
room textures. Again, use the keyboard to check if the room is getting too ripply or
too glassy.
9. Set the Diffusion (
DIFF
) to 78%.
S
ET THE
R
EVERB
P
REDELAY
Our next step is editing the Pre-delay parameters on
PARAM2
. (We’ll come back to the
Bass Boost parameters once the program is structured better.)
10. Press soft button
3
(
PARAM2
)
Pre-delay was originally used to simulate the delay before hearing reverberation in a
large hall. However, in modern reverb program it is used more for effect. You can
use predelay on a bass sound to make the initial attack clearer. You can also leak
some non-predelayed reverb using the Pre-delay Mix (
large hall. However, in modern reverb program it is used more for effect. You can
use predelay on a bass sound to make the initial attack clearer. You can also leak
some non-predelayed reverb using the Pre-delay Mix (
PDMIX
) if you want. For this
program, let’s try a Pre-delay Time (
PDTIME
) of 32ms with 100% mix for a splash of
reverb.
11. Turn soft knob
1
until the value of
PDTIME
is 32.
12. Turn soft knob
2
(
PDMIX
) all the way up (100).
C
HANGE THE
T
ONE OF THE
R
EVERB
D
ECAY
The Low and High Frequency Damping parameters are controlled by soft knobs
4
and
5
on this page (
LDAMP
and
HDAMP
). The damping parameters interact with the
Decay time according to frequency. In a hall with no high frequency damping, the
high frequencies will “sizzle” with a long decay. With no low frequency damping,
the low frequencies will boom with a long decay, as in a large cement parking
garage. Raising the frequency of the Low damping will cut the decays below that
high frequencies will “sizzle” with a long decay. With no low frequency damping,
the low frequencies will boom with a long decay, as in a large cement parking
garage. Raising the frequency of the Low damping will cut the decays below that
frequency (like adding bass traps to the hall), and lowering the frequency of the High
Damping will cut the decays above the frequency (like adding drapes and couches to
the hall).
Damping will cut the decays above the frequency (like adding drapes and couches to
the hall).
For this room, leave Low Damping off and set High Damping for 2.14kHz as follows:
13. Turn soft knob
4
all the way off (
LDAMP = OFF
).
14. Turn soft knob
5
to set the High Frequency Damping (
HDAMP = 2.140
).
Remember that if you set the High Damping higher than the input LPF, it will do
almost nothing. Notice how the apparent decay drops off when you do this, and that
almost nothing. Notice how the apparent decay drops off when you do this, and that
the room starts to sound more natural.
Press soft button
4
(
PARAM3
) to see the last parameters of the Large Hall Reverb
program. Swirl (soft knob
1
of this page) is an effect which simulates moving walls.
Set to a low value, it can add subtle movement to your reverb sound. Set high, it
adds chorusing to the room. we’ll leave it off in this example. We’re not looking for a
adds chorusing to the room. we’ll leave it off in this example. We’re not looking for a
gated reverb sound, so we’ll leave Gate set to zero (otherwise, it will “chop off” the
reverb sound once it reaches a certain point).
reverb sound once it reaches a certain point).
0 60%
0
0
0
SWIRL
DEPTH
GATE
HOLD
RELEAS