Electronic Drums

Electronic drums

• Triggers are sensors that can be attached to drum kit components. In this way, an electronic drum sound will be produced when the instrument is played, as well as the sound made by the instrument.
• Trigger pads can be mounted alongside other components. These pads make no significant sound themselves, but purely trigger the electronic sound, and are played with the same drum sticks as other drum kit components.

In either case, a control unit (brain) with suitable sampled sounds, and amplification equipment are both required. Sometimes, for the sake of appearance or of the desired "feel" of the instrument, a drum with a trigger will be used as a trigger pad by muffling it so heavily that no significant sound at all is produced, see Electronic drum#Acoustic triggered drum kit.

A trigger pad can contain up to four independent sensors, each of them capable of sending to the brain information describing the timing and intensity of a stroke. A circular drum pad will normally contain only one sensor, but a cymbal-shaped pad often contains two, one for the body and one for the rim of the cymbal, and a triangular pad may contain four, one for the body, played by the stick tips, and one for the rim of each side, played by the stick shafts. (Commonly called a rim shot and often used to trigger a similar effect, playing the rim of the trigger pad is a significantly different and far simpler technique, as it is not necessary or even desired to strike the body of the pad.)

Trigger sensors are most commonly used to replace the acoustic drum sounds. For example, in a live performance in a difficult acoustical space, a sensor may be placed on every drum and cymbal, and used in each case to trigger a similar sound. These sounds are then amplified through the PA and are all the audience hears, and can be amplified to any level without the feedback problems associated with microphones. The sound of the drums and cymbals themselves is heard by the drummer and possibly other musicians, but even there the foldback system will be fed from the electronic sounds rather than the live sounds. The drums can be heavily muffled, and their tuning and even quality is less critical. In this way much of the atmosphere of the live performance is retained but without some of the problems associated with amplified drums.

Trigger sensors can also be used in conjunction with conventional or built-in microphones. If some components of a kit prove more difficult to "mike" than others, sensors may be used on only the more difficult instruments.

Trigger pads on the other hand when used in a conventional kit are most commonly used to produce sounds not otherwise available. Any sound that can be sampled can be used. Recordings of barking dogs and stereo recordings of aircraft taking off and landing have for example been used to great effect, as well as the more obvious electronically generated sounds.