Roland V-Drums TD-30 Owner's Manual page 135

Trigger signal detection time
(Scan Time)
Since the rise time of the trigger signal waveform may
differ slightly depending on the characteristics of each
pad or acoustic drum trigger (drum pickup), you may
notice that identical hits (velocity) may produce sound at
different volumes. If this occurs, you can adjust the "Scan
Time" so that your way of playing can be detected more
precisely.
Value Explanation
While repeatedly hitting the pad at a constant
force, gradually raise the Scan Time value from
0 msec, until the resulting volume stabilizes
at the loudest level. At this setting, try both
soft and loud strikes, and make sure that the
volume changes appropriately.
0–4.0 ms
* As the value is set higher, the time it takes for
the sound to be played increases. Set this to
the lowest value possible.
Double triggering prevention (Mask Time)
When playing a kick trigger the beater can bounce back
and hit the head a second time immediately after the
intended note—with acoustic drums sometimes the
beater stays against the head—this causes a single hit to
"double trigger" (two sounds instead of one). The Mask
Time setting helps to prevent this. Once a pad has been
hit, any additional trigger signals occurring within the
specified "Mask Time" (0–64 msec) will be ignored.
Value Explanation
Adjust the "Mask Time" value while playing the
pad. When using a kick trigger, try to let the
beater bounce back and hit the head very quickly,
then raise the "Mask Time" value until there are no
more sounds made by the beater rebound.
0–64 ms
MEMO
If two or more sounds are being produced when you
strike the head just once, then adjust Retrig Cancel.
Scan Time
Time
Mask Time
Time
Sound not produced
Detecting trigger signal attenuation
(Retrigger Cancel)
Important if you are using acoustic drum triggers. Such
triggers can produce altered waveforms, which may also
cause inadvertent sounding at Point A in the following
figure (Retrigger).
This occurs in particular at the decaying edge of the
waveform. Retrigger Cancel detects such distortion in
and prevents retriggering from occurring.
Value Explanation
While repeatedly striking the pad, raise the
"Retrig Cancel" value until retriggering no
longer occurs.
Although setting this to a high value prevents
1–16
retriggering, it then becomes easy for sounds
to be omitted when the drums played fast (roll
etc.). Set this to the lowest value possible while
still ensuring that there is no retriggering.
MEMO
Although setting this to a high value prevents
retriggering, it then becomes easy for sounds to be
omitted when the drums played fast (roll etc.). Set
this to the lowest value possible while still ensuring
that there is no retriggering.
Trigger Settings
Time
135