The smallest and largest drums without snares, octobans and gong drums respectively, are sometimes considered toms. The naming of common configurations (four-piece, five-piece, etc.) is largely a reflection of the number of toms, as only the drums are conventionally counted, and these configurations all contain one snare and one or more bass drums, (though not regularly any standardized use of 2 bass/kick drums) the balance usually being in toms.
By World War I, drum kits were often marching band-style military bass drums with many percussion items suspended on and around them. Drum kits became a central part of jazz music, especially Dixieland. The modern drum kit was developed in the Vaudeville era during the 1920s in New Orleans. In 1917, a New Orleans band called "The Original Dixieland Jazz Band " recorded jazz tunes that became hits all over the country. These were the first official jazz recordings. Drummers such as Baby Dodds, "Zutty" Singleton and Ray Bauduc had taken the idea of marching rhythms, combining the bass drum and snare drum and "traps", a term used to refer to the percussion instruments associated with immigrant groups, which included miniature cymbals, tom toms, cowbells and woodblocks. They started incorporating these elements with ragtime, which had been popular for a couple of decades, creating an approach which evolved into a jazz drumming style.
A drum kit — also called a drum set, trap set (a term using a contraction of the word, “contraption”), or simply drums — is a collection of drums and other percussion instruments, typically cymbals, which are set up on stands to be played by a single player, with drumsticks held in both hands, and the feet operating pedals that control the hi-hat cymbal and the beater for the bass drum. A drum kit consists of a mix of drums (categorized classically as membranophones, Hornbostel-Sachs high-level classification 2) and idiophones – most significantly cymbals, but can also include the woodblock and cowbell (classified as Hornbostel-Sachs high-level classification 1). In the 2000s, some kits also include electronic instruments (Hornbostel-Sachs classification 53). Also, both hybrid (mixing acoustic instruments and electronic drums) and entirely electronic kits are used.
Drums with cylindrical shells can be open at one end (as is the case with timbales), or can have two drum heads, one head on each end. Single-headed drums typically consist of a skin stretched over an enclosed space, or over one of the ends of a hollow vessel. Drums with two heads covering both ends of a cylindrical shell often have a small hole somewhat halfway between the two heads; the shell forms a resonating chamber for the resulting sound. Exceptions include the African slit drum, also known as a log drum as it is made from a hollowed-out tree trunk, and the Caribbean steel drum, made from a metal barrel. Drums with two heads can also have a set of wires, called snares, held across the bottom head, top head, or both heads, hence the name snare drum. On some drums with two heads, a hole or bass reflex port may be cut or installed onto one head, as with some 2010s era bass drums in rock music.
There are many different types of keyboards available. On the lower end are keyboards that you’d find in a toy store, while music stores have keyboards that are more fully-featured and intended for serious musicians and producers. These types of keyboards are commonly loaded with different voices, tones, rhythms, and sound effects to give a player or producer a lot of control over their sound. Within this type of keyboard, you’ll find synthesizers and MIDI controllers. Another differentiator among keyboards is the number of keys. Some keyboards have fewer than the traditional 88 keys you’d find on a digital piano. This allows certain keyboards to be more compact and generally doesn’t impact the ability for the player to create music. While some keyboards have keys that are weighted, many do not. This means that keyboards do not move or react like piano keys.
Sheet music from the 1920s provides evidence that the drummer's sets were starting to evolve in size and sound to support the various acts mentioned above. However, the first "talkies" or films with audio, were released circa 1927 and by 1930 most films were released with a soundtrack and the silent film era was over. The downside of the technological breakthrough was that thousands of drummers who served as sound effect specialists were put out of work overnight. A similar panic was felt by drummers in the 1980s, when electronic drum machines were first released.
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.