Drum kit music is either written down in music notation (called "drum parts"), learned and played "by ear", improvised or some combination of some or all three of these methods. Professional session musician drummers and Big Band jazz drummers are often required to read drum parts. Drum parts are most commonly written on a standard five-line staff. In 2016, a special percussion clef is used, while previously the bass clef was used. However, even if the bass or no clef is used, each line and space is assigned an instrument of the kit, rather than to a pitch. In jazz, traditional music, folk music, rock music and pop music, drummers are expected to be able to learn songs by ear (from a recording or from another musician who is playing or singing the song) and improvise. The degree of improvisation differs in different styles. Jazz and jazz fusion drummers may have lengthy improvised solos in every song. In rock music and blues, there are also drum solos in some songs, although they tend to be shorter than those in jazz. Drummers in all popular music and traditional music styles are expected to be able to improvise accompaniment parts to songs, once they are told the genre or style (e.g., shuffle, ballad, slow blues, etc.).
Chinese troops used tàigǔ drums to motivate troops, to help set a marching pace, and to call out orders or announcements. For example, during a war between Qi and Lu in 684 BC, the effect of drum on soldier's morale is employed to change the result of a major battle. Fife-and-drum corps of Swiss mercenary foot soldiers also used drums. They used an early version of the snare drum carried over the player's right shoulder, suspended by a strap (typically played with one hand using traditional grip). It is to this instrument that the English word "drum" was first used. Similarly, during the English Civil War rope-tension drums would be carried by junior officers as a means to relay commands from senior officers over the noise of battle. These were also hung over the shoulder of the drummer and typically played with two drum sticks. Different regiments and companies would have distinctive and unique drum beats only they recognized. In the mid-19th century, the Scottish military started incorporating pipe bands into their Highland Regiments.
Bassists trying to emulate the sound of a double bass sometimes pluck the strings with their thumb and use palm-muting to create a short, "thumpy" tone. Monk Montgomery (who played in Lionel Hampton's big band) and Bruce Palmer (who performed with Buffalo Springfield) use thumb downstrokes. The use of the thumb was acknowledged by early Fender models, which came with a "thumbrest" or "Tug Bar" attached to the pickguard below the strings. Contrary to its name, this was not used to rest the thumb, but to provide leverage while using the thumb to pluck the strings. The thumbrest was moved above the strings in 1970s models (as a true thumbrest) and eliminated in the 1980s. Nevertheless, some reissued versions of vintage Fender basses in the 2010s do include a thumbrest.
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.
Torzal Natural Twist is a bass guitar body and neck style invented by luthier Jerome Little from Amherst, Massachusetts. It consists of a neck rotated by a total of 35 degrees, with (+)15 degrees at the bridge and (-)20 at the nut. The designer claims that the ergonomic design increases efficiency of the hands, wrists and arms, which reduces the risk of developing repetitive strain injuries like carpal tunnel syndrome or tendonitis. This design is also beneficial to players who have already suffered from such injuries. This patented design differs from traditional bass guitar design by twisting the neck, and bringing the strings toward a more natural hand position at either end of the instrument. The rotation at either side of the instrument in the direction of the hand creates a neck plane that models the natural motion of the hand as it reaches outward. The fretboard also forms a straight line at the location of each string, which should improve the ease of performance.
Specific bass brands/models became identified with particular styles of music, such as the Rickenbacker 4001 series, which became identified with progressive rock bassists like Chris Squire of Yes, and Geddy Lee of Rush, while the StingRay was used by funk/disco players such Louis Johnson of the funk band The Brothers Johnson and Bernard Edwards of Chic. The 4001 stereo bass was introduced in the late 1960s; it can be heard on the Beatles' "I Am The Walrus." 
In piano lingo, “action” describes the way the piano keys feel when you press on them. With a digital piano, the closer the action is to that of an acoustic piano, the better. Semi-weighted action uses a spring to create the resistance felt when pressing a key and its rebound when you lift your finger. Hammer action uses a hammer mechanism like that found in an acoustic piano to replicate the feel. Graded, or progressive, hammer action takes that a step further by increasing the weight of the action as you descend to the lower notes on the keyboard. Using a keyboard with weighted action is beneficial for multiple reasons. It helps build finger strength while practicing (a spring-based action will only minimally address this), and it allows for more variation and musicality in the way you play a note. While a piano keyboard might look like nothing more than a bunch of on/off switches, in reality there’s a range of volumes and timbres that can be achieved depending on how quickly or strongly you depress the keys. Hammer action best replicates those possibilities.
Of our three picks, the Alesis Recital Pro is by far the easiest to use. All instrument selection is done with six buttons on the console (two sounds per button). Buttons for modulation, chorus, and reverb effects are provided, and there’s a display to show all the settings and parameters. Unlike our other picks, the Alesis’ metronome function can be adjusted anywhere from 30 to 280 BPM, with the speed shown on the display.
The bass guitar (also known as electric bass, or bass) is a stringed instrument similar in appearance and construction to an electric guitar, except with a longer neck and scale length, and four to six strings or courses. The four-string bass is usually tuned the same as the double bass, which corresponds to pitches one octave lower than the four lowest pitched strings of a guitar (E, A, D, and G). The bass guitar is a transposing instrument, as it is notated in bass clef an octave higher than it sounds. It is played primarily with the fingers or thumb, by plucking, slapping, popping, strumming, tapping, thumping, or picking with a plectrum, often known as a pick. The electric bass guitar has pickups and must be connected to an amplifier and speaker, to be loud enough to compete with other instruments.
On the topic of performing: is it the stage you have your sights on? In that case, set your sights on stage pianos, like the Roland RD-300NX for example. Powered by Roland's proprietary "SuperNATURAL" sound engine, it's so true-to-life that an audience just might find themselves wondering where you've hidden the baby grand. Another great suggestion is the Nord Stage 2 88-Key Stage Keyboard, which uses three sound-generating sections working together to provide outstanding versatility.