Various typical motions can be characterized by the signals coming
from the drumsticks. To process these signals the gestures must be mapped
to control a musical event and all the motions associated with the gesture
must be captured. For instance, the start of a strike is recognized
when the velocity exceeds a threshold value. At the time of minimum
z of a strike, the digitized measure of the four corner signals is reported
to the host. The mapping may also trigger different sounds, change the
volume, pitch, tone or timbre depending on the x,y position at strike
time. Analog signals from the Radio Drum are band-limited to 700 Hz.
Since a human is not capable of drumming faster than once every 40 msec,
the gesture signal should not be faster than 250 Hz. These characteristics
are taken into consideration in the filter design and implementation.
These filters are created in a program called MAX/MSP located on the