Detuners, such as the Hipshot, are mechanical devices the player operates with the thumb on the fretting hand to quickly retune one or more strings to a pre-set lower pitch. Hipshots typically drop the E-string down to D on a four-string bass. Rarely, some bassists (e.g., Michael Manring) add detuners to more than one string, or even more than one detuner to each string, so they can retune during a performance and access a wider range of chime-like harmonics.
On early recording media (until 1925) such as wax cylinders and discs carved with an engraving needle, sound balancing meant that musicians had to be literally moved in the room. Drums were often put far from the horn (part of the mechanical transducer) to reduce sound distortion. Since this affected the rendition of cymbals at playback, sound engineers of the time remedied the situation by asking drummers to play the content of the cymbals onto woodblocks, temple blocks, and cowbells for their loudness and short decay.
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." 
A well-known bass humbucker is the pickup used on the Music Man series of basses; it has two coils, each with four large polepieces. This style is known as the "MM" pickup for this reason, and many aftermarket pickup manufacturers (companies that make and sell pickups that you can custom-add to your bass) and custom bass builders incorporate these pickups in their designs. The most common configurations are a single pickup at the bridge, two pickups similar in placement to a Jazz Bass, or an MM pickup at the bridge with a single-coil pickup (often a "J") at the neck. These pickups can often be "tapped", meaning one of the two coils can be essentially turned off, giving a sound similar to a single-coil pickup.
Many students that are interested in learning to play the piano don’t start by playing a large grand piano. Because of the high cost and amount of space required, most people who are just starting to learn the piano will buy a digital piano or a keyboard. It’s not uncommon for people to erroneously use the terms “digital piano” and “keyboard” interchangeably. What these people don’t know is that there are many significant differences between digital or electronic pianos and keyboards. In this article, we’ll go into some of the differences as well as what they mean for the music that each instrument is able to produce.
Combining rich acoustic sound with modern music technology, digital pianos are sophisticated instruments that are played and favoured by professionals and amateur musicians around the world. More lightweight and affordable than full-size grand pianos, today's digital pianos sound so close to their classic counterparts that untrained ears would have a hard time telling the sound produced by the two apart! In this section you'll find a wide variety of home and stage digital pianos from all the big brands. Yamaha, Suzuki, Roland and more, they're all here, so if you're in the market for a digital piano that was designed to perform, you're definitely in the right spot.