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.
In general, the sounds produced by a digital piano are based on sampling, by which real piano sound samples are stored in ROM. The samples stored in digital pianos are usually of very precision recording and made using high-quality pianos, expensive microphones, and high-quality preamps in a professional recording studio. ROM may include multiple samples for the same keystroke, attempting to reproduce diversity observed on the real piano, but the number of these recorded alternatives is limited.
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.
In the 2010s, some drummers use a variety of auxiliary percussion instruments, found objects, and electronics as part of their "drum" kits. Popular electronics include: electronic sound modules; laptop computers used to activate loops, sequences and samples; metronomes and tempo meters; recording devices; and personal sound reinforcement equipment (e.g., a small PA system to amplify electronic drums and provide a monitor).
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.
Microphones ("mics") are used with drums to pick up the sound of the drums and cymbals for a sound recording and/or to pick up the sound of the drum kit so that it can be amplified through a PA system or sound reinforcement system. While most drummers use microphones and amplification in live shows in the 2010s, so that the sound engineer can adjust and balance the levels of the drums and cymbals, some bands that play in quieter genres of music and that play in small venues such as coffeehouses play acoustically, without mics or PA amplification. Small jazz groups such as jazz quartets or organ trios that are playing in a small bar will often just use acoustic drums. Of course if the same small jazz groups play on the mainstage of a big jazz festival, the drums will be mic'ed so that they can be adjusted in the sound system mix. A middle-ground approach is used by some bands that play in small venues; they do not mic every drum and cymbal, but rather mic only the instruments that the sound engineer wants to be able to control in the mix, such as the bass drum and the snare.
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." 
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The bass guitars will have either 4, 5 or 6 strings. Though it may be tempting to go for the guitar with 6 strings, going for the 4-stringed is good for a new player. A bass guitar is a type of stringed instrument that plays a lower tone and sounds more impressive than a regular guitar. The most notable difference is that a bass guitar may have as few as four strings and they are much thicker. The thicker strings are what give the bass its low tone.
There are several reasons for this division. When more than one band plays in a single performance, the drum kit is often considered part of the backline (the key rhythm section equipment that stays on stage all night, which often also includes bass amps and a stage piano), and is shared between/among the drummers. Oftentimes, the main "headlining" act will provide the drums, as they are being paid more, possibly have the better gear, and in any case have the prerogative of using their own. Sticks, snare drum and cymbals, and sometimes other components, are commonly swapped though, each drummer bringing their own. The term breakables in this context refers to whatever basic components the "guest" drummer is expected to bring. Similar considerations apply if using a "house kit" (a drum kit owned by the venue, which is rare), even if there is only one band at the performance.
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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.
Most five-piece kits, at more than entry level, also have one or more effects cymbals. Adding cymbals beyond the basic ride, hi-hats and one crash configuration requires more stands in addition to the standard drum hardware packs. Because of this, many higher-cost kits for professionals are sold with little or even no hardware, to allow the drummer to choose the stands and also the bass drum pedal he/she prefers. At the other extreme, many inexpensive, entry-level kits are sold as a five-piece kit complete with two cymbal stands, most often one straight and one boom, and some even with a standard cymbal pack, a stool and a pair of 5A drum sticks. In the 2010s, digital kits are often offered in a five-piece kit, usually with one plastic crash cymbal triggers and one ride cymbal trigger. Fully electronic drums do not produce any acoustic sound beyond the quiet tapping of sticks on the plastic or rubber heads. The trigger-pads are wired up to a synth module or sampler.
Finally, the last but not the least, you need to consider the price of the guitar when purchasing a bass guitar. Before setting your foot in the store, you need to set a budget in your mind for how much you want to spend. As a beginner, you will probably want to take a look at the entry level models. You can pick up one that sounds quite nice for under $500. If you are still uncertain whether you want to make it a full-time commitment to playing the bass, try to look for a cheaper model. A decent guitar can be had for around $200. Try not to be tempted by some shiny, more expensive models as they are beyond your skill level at this point may be. You can always buy something more advanced and high quality when you get better in your bass guitar training.
Bass drum Muffling the bass can be achieved with the same muffling techniques as the snare, but bass drums in a drum kit are more commonly muffled by adding pillows, a sleeping bag or another soft filling inside the drum, between the heads. Cutting a small hole in the resonant head can also produce a more muffled tone, and allows manipulation in internally placed muffling. The Evans EQ pad places a pad against the batterhead and, when struck, the pad moves off the head momentarily, then returns to rest against the head, thus reducing the sustain without choking the tone.
The number of frets installed on a bass guitar neck may vary. The original Fender basses had 20 frets, and most bass guitars have between 20 and 24 frets or fret positions. Instruments with between 24 and 36 frets (2 and 3 octaves) also exist. Instruments with more frets are used by bassists who play bass solos, as more frets gives them additional upper range notes. When a bass has a large number of frets, such as a 36 fret instrument, the bass may have a deeper "cutaway" to enable the performer to reach the higher pitches. Like electric guitars, fretted basses typically have markers on the fingerboard and on the side of the neck to assist the player in determining where notes and important harmonic points are. The markers indicate the 3rd, 5th, 7th, 9th fret and 12th fret (the 12th fret being the octave of the open string) and on the octave-up equivalents of the 3rd fret and as many additional positions as an instrument has frets for. Typically, one marker is on the 3rd, 5th, 7th and 9th fret positions and two markers on the 12th fret.
The electric bass is a relative newcomer to the world of jazz. The big bands of the 1930s and 1940s Swing era and the small combos of the 1950s Bebop and Hard Bop movements all used the double bass. The electric bass was introduced in some bands in the 1950s and it became prominent during the late 1960s and early 1970s, when rock influences were blended with jazz to create jazz-rock fusion.
A player can use the fretting hand to change a sounded note, either by fully muting it after plucking it, or by partially muting it near the bridge to reduce volume, or make the note fade faster. The fretting hand often mutes strings that are not being played to stop sympathetic vibrations, particularly when the player wants a "dry" or "focused" sound. On the other hand, the sympathetic resonance of harmonically related strings are sometimes desirable. In these cases, a bassist can fret harmonically related notes. For example, while fretting a sustained "F" (on the third fret of the "D" string), underneath an F major chord being played by a piano player, a bassist might hold down the "C" and low "F" below this note so their harmonics sound sympathetically.
Although these kits may be small with respect to the number of drums used, the drums themselves are most often normal sizes, or even larger in the case of the bass drum. Kits using smaller drums in both smaller and larger configurations are also produced for particular uses, such as boutique kits designed to reduce the visual impact that a large kit creates or due space constraints in coffeehouses, travelling kits to reduce luggage volume, and junior kits for very young players. Smaller drums also tend to be quieter, again suiting smaller venues, and many of these kits extend this with extra muffling which allows quiet or even silent practice in a hotel room or bedroom.
While digital pianos may sometimes fall short of a real piano in feel and sound, they nevertheless have other advantages over acoustic pianos. Digital pianos cost much less than an acoustic piano and most models are much smaller and lighter in weight than an acoustic piano. In addition, digital pianos do not need to be tuned, and their tuning can be modified to match the tuning of another instrument (e.g., a pipe organ). Like other electronic musical instruments, digital pianos can be connected to a keyboard amplifier or a PA system to produce a sound loud enough for a large venue. Some digital pianos can also emulate other sounds besides the piano, the most common ones being pipe organ, electric piano, Hammond organ and harpsichord. Digital pianos are often used in music schools and music studios to replace traditional instruments.