As well as providing an alternative to a conventional acoustic drum kit, electronic drums can be incorporated into an acoustic drum kit to supplement it. MIDI triggers can also be installed into acoustic drum and percussion instruments. Pads that can trigger a MIDI device can be homemade from a piezoelectric sensor and a practice pad or other piece of foam rubber.
Some cymbals may be considered effects in some kits but "basic" in another set of components. A swish cymbal may, for example serve, as the main ride in some styles of music, but in a larger kit, which includes a conventional ride cymbal as well, it may well be considered an effects cymbal per se. Likewise, Ozone crashes have the same purpose as a standard crash cymbal, but are considered to be effects cymbals due to their rarity, and the holes cut into them, which provide a darker, more resonant attack.
The sound of electronic drums and cymbals themselves is heard by the drummer and possibly other musicians in close proximity, but even so, the foldback (audio monitor) system is usually fed from the electronic sounds rather than the live acoustic sounds. The drums can be heavily dampened (made to resonate less or subdue the sound), and their tuning and even quality is less critical in the latter scenario. In this way, much of the atmosphere of the live performance is retained in a large venue, but without some of the problems associated with purely microphone-amplified drums. Triggers and 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 (e.g., an excessively "boomy" low tom), triggers may be used on only the more difficult instruments, balancing out a drummer's/band's sound in the mix.
Bass bodies are typically made of wood, although other materials such as graphite (for example, some of the Steinberger designs) and other lightweight composite materials have also been used. While a wide variety of woods are suitable for use in the body, neck, and fretboard of the bass guitar, the most common types of wood used are similar to those used for electric guitars; alder, ash or mahogany for the body, maple for the neck, and rosewood or ebony for the fretboard. While these traditional standards are most common, for tonal or aesthetic reasons luthiers more commonly experiment with different tonewoods on basses than with electric guitars (though this is changing), and rarer woods like walnut and figured maple, as well as exotic woods like bubinga, wenge, koa, and purpleheart, are often used as accent woods in the neck or on the face of mid- to high-priced production basses and on custom-made and boutique instruments.
Eight and twelve-string models are both built on the same "course string" concept found on twelve-string guitars, where sets of strings are spaced together in groups of two or three that are primarily played simultaneously. These instruments typically have one of the strings in each course tuned an octave above the 'standard' string, although a fifth above is also used. Instruments with ten and fifteen strings, grouped in five courses, also exist, as do "extended-range basses" or ERBs with non-coursed string counts rivaling those of coursed-string basses.
Drummers use a variety of accessories when practicing. Metronomes and beat counters are used to develop a sense of a steady pulse. Drum muffling pads may be used to lessen the volume of drums during practicing. A practice pad, held on the lap, on a leg, or mounted on a stand, is used for near-silent practice with drumsticks. A set of practice pads mounted to simulate an entire drum kit is known as a practice kit. In the 2010s, these have largely been superseded by electronic drums, which can be listened to with headphones for quiet practice and kits with non-sounding mesh heads.
Just like the acoustic instruments they're derived from, digital pianos come in different sizes. They also offer dozens of options for your perusal, so you can weigh all kinds of factors to find the right model for you. For instance, if you're looking to pack a lot of piano into as small a space as possible, consider instruments such as the Williams Allegro 88-Key Digital Piano or the Casio CDP-120. These are fairly compact pianos, but that doesn't limit the breadth of their samples and sound settings.