Vcurve; Dcay; Noise; Gain - Alesis D4 Quick Setup Manual

EXIERNAL 7RIOOER.
QUIGK 5EI-UP OUIDE
The D4 has twelve trigger inputs designed to accommodate the
most widely used drum pads and other triggering sources. It's
triggering mechanism is an advanced signal to midi converter
which incorporates five user controllable parameters. Trigger
parameters are independent for each of the twelve inputs, and
the set up is global for all drumsets.
The five types of user controlled parameters are:
1. VCURVE. There are eight separate curve tables, 0 through 7
which represent the velocity curve, or sensitivity of the trigger
input. Curves 1-3 have the least amount of sensitivity; curve 4
has the median, or "average type of play" sensitivity; and
curves 5-7 are the most sensitive. Curve 0 is "Unassigned".
This is a special situation parameter which is fully explained
in section 5.2 of the D4 Reference Manual.
2. XTALK. The crosstalk parameter is the trigger suppression
level adjustment. It is used to control interaction problems
between pads or drums. Crosstalk problems can occur when
two or more pads are mounted on a single stand or rack.
3. DCAY. This represents the signal decay time and threshold
of the D4's trigger inputs. In other words, DCAY controls the
amount of time between once a pad has been struck and
triggers, to when it will trigger again from another hit.
When properly adjusted, this parameter defeats "double
triggering " by allowing the D4 to determine which signals
are actual hits, and which are secondary decay signals.
4. NOISE. The NOISE parameter allows you to control the
noise floor, or the signal level threshold that an exterior
vibration or sound must exceed before it will trigger a drum
sound. This is used mostly in situations where the stage
volume and vibrations are strong enough to "rattle" the
drum hardware to such a point that the D4 "thinks" these
vibrations are actual hits.
5. GAIN. This is the signal strength that the transducer is
sending to the triggers in the D4, It's adjustment is very
similar to that of a tape recorder's VU meter. With the gain
threshold set too low, soft hits may never be recognized.