P4 The Threshold Function; P4 The Hat Threshold Function; P5 The Retrigger Function - Alesis DM Pro Reference Manual

P4 T
HE
This Function determines the point where a trigger input will be accepted by the DM
Pro. The Threshold Value for each Trigger is the lowest point where a Trigger will
sound a Drum. In a noisy live environment, this Value should be set higher (try -50
or above: i.e., -40, -30, -20, etc.) to help gate out false trigger messages caused by bass
amps or stage monitors. In a quiet studio environment, this Value can be set lower (-
60 or below: i.e., -70, -80, etc.) since there will be substantially less interference with
the Trigger.
This Function exists on a per-Trigger basis because some Triggers will be more
susceptible to noise than others. A rack tom trigger, for example, will tend to pick up
much more noise than a kick drum trigger due to its location. Since the kick drum
trigger is more isolated, it is less susceptible to noise interference.
Note that the Noise Suppression Function (described below) allows you to filter out
false triggering for the whole Trigger Setup, essentially setting the Threshold for each
Trigger above the noise floor. Use the Noise Suppression Function in conjunction
with the Threshold Function to scale your Triggers for the most dynamic and
isolated kit response.
P4 T
HE
(Triggers 15 and 16 only)
Unlike the Threshold Function for Triggers 1-14, the Hat Threshold Function does
not set the velocity point above which the Hi-Hats will be triggered (that is handled
on Page 5 for Triggers 13 and 14). What the Hat Threshold Function does is choose
the point at which the Hat Pedal will switch between the Note Up and Note Down
MIDI Note Number assignments. You'll only notice a change on this parameter if
you are using a continuously variable pedal and the Hat Pedal Type Function is set
to (since a momentary footswitch only has two positions, full On and full Off).
PEDAL
To choose the point in the Hat Pedal's "travel" at which the Hi-Hat will transition
from the Note Down and Note Up assignments, move the cursor beneath the Value
and turn the Value encoder to toggle the selection:
HatThreshold:-3 0
Note also that if you change the value of this Function while on Trigger 15, the Value
also will have changed for Trigger 16, and vice-versa. This is because these two
Triggers share this Value; it is the dividing line between them.
P5 T
HE
This is a tremendously helpful "gating" Function that prevents multiple misfiring of
a Trigger Input by setting a minimum time between trigger instances. Because of the
sensitive nature of drum pads and external triggers, it is common for one trigger hit
to result in 2 or more trigger messages being sent. This can devour polyphony very
quickly and cause the performance to sound artificial.
To prevent this multiple triggering from occurring, play the pad or drum trigger as
fast as you can and set the Retrigger Function to the maximum Value that will
DM P R M
RO EFERENCE
THRESHOLD F
HAT THRESHOLD F
P4
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RETRIGGER F
UNCTION
ANUAL
UNCTION
UNCTION
Triggers
1 0 7