Think of some of your favorite songs. Maybe they get your toes tapping, or get you pumped up and ready to take on the world. Regardless of your musical preferences, the odds are that one thing all of our favorite songs have in common is an absolutely killer bass line. The bass has played a key role in holding down the rhythm throughout the history of popular music, and continues to make an impact to this day. Another One Bites the Dust by Queen, Been Caught Stealing by Jane's Addiction, Money by Pink Floyd, Sweet Emotion by Aerosmith, and Longview by Green Day are just a few examples of songs that are taken to the next level thanks to their incredible bass lines. Now it's your time to make your mark on this instrument with some serious grooves of your own. You'll find bass guitars for every skill level and playing style in this section.
Toward the end of the 1920s, variations of the hi-hats were introduced. One of the most popular hand held hi-hat cymbal variations used was called the "hand sock cymbals". The reason for the name "hi-hat" was because earlier versions of the hi-hat were referred to as a "low boy". The evolution that became the "hi-hats" allowed drummers to play the two cymbals with drum sticks while simultaneously controlling how open or closed the two cymbals were with their foot. The pedal could also be used to play the cymbals with the foot alone, while the right hand played other drums. By the 1930s, Ben Duncan and others popularized streamlined trap kits leading to a basic four piece drum set standard: bass, snare, tom-tom, and a larger floor tom. In time, legs were fitted to larger floor toms, and "consolettes" were devised to hold smaller tom-toms (ride toms) on the bass drum.
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.
In the 1980s, bass designers continued to explore new approaches. Ned Steinberger introduced a headless bass in 1979 and continued his innovations in the 1980s, using graphite and other new materials and (in 1984) introducing the TransTrem tremolo bar. In 1982, Hans-Peter Wilfer founded Warwick, to make a European bass, as the market at the time was dominated by Asian and American basses. Their first bass was the Streamer Bass, which is similar to the Spector NS. In 1987, the Guild Guitar Corporation launched the fretless Ashbory bass, which used silicone rubber strings and a piezoelectric pickup to achieve an "upright bass" sound with a short 18-inch (457 mm) scale length. In the late 1980s, MTV's "Unplugged" show, which featured bands performing with acoustic instruments, helped to popularize hollow-bodied acoustic bass guitars amplified with piezoelectric pickups built into the bridge of the instrument.
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." 
Once upon a time, the only piano you could buy was a large and ridiculously expensive acoustic grand piano. Thanks to advances in flash memory, sampling, and other digital technology, we now have more compact and affordable options known as digital pianos. As time goes on, these digital options continue to get closer to genuine acoustic pianos in terms of sound and feel. In fact, many traditional piano brands have sampled their most famous grand pianos to make the signature tone available in portable digital models. The keyboards on digital pianos are designed with special weighted actions and textured finishes to simulate the ebony and ivory keys on acoustic instruments.