An LCD readout and a few more buttons on the control panel would go a long way toward making the keyboard’s options easier to use. The metronome function especially could be more user friendly. It has 10 speed presets, labeled 0-9, with a + and – for adjustment. These are selectable with the Function button and a key press. While practicing and deciding on tempo, most students find it more beneficial to know the exact BPM (beats per minute), which is impossible here using the built-in metronome.
Extended-range basses (ERBs) are basses with six to twelve strings—with the additional strings used for range rather than unison or octave pairs. A seven-string bass (B0–E1–A1–D2–G2–C3–F3) was built by luthier Michael Tobias in 1987. This instrument, commissioned by bassist Garry Goodman, was an early example of a bass with more than six single course strings. In 1999 South American ERB player Igor Saavedra designed one of the first eight-string ERBs known, and asked Luthier Alfonso Iturra to build it for him.  Conklin builds custom ERB basses. The Guitarbass is a ten-string instrument with four bass strings (tuned E–A–D–G) and six guitar strings (tuned E–A–D–G–B–E). Luthier Michael Adler built the first eleven-string bass in 2004 and completed the first single-course 12-string bass in 2005. Adler's 11- and 12-string instruments have the same range as a grand piano. Subcontrabasses, such as C♯–F♯–B–E (the lowest string, C♯0 being at 17.32 Hz at around the limit of human hearing) have been created. Ibanez had released SR7VIISC in 2009, featuring a 30-inch (762 mm) scale and narrower width, and tuned as B–E–A–D–G–C–E; the company dubbed it a cross between bass and guitar.[better source needed]
Popular music bands and rock groups use the bass guitar as a member of the rhythm section, which provides the chord sequence or "progression" and sets out the "beat" for the song. The rhythm section typically consists of a rhythm guitarist or electric keyboard player, or both, a bass guitarist and a drummer; larger groups may add additional guitarists, keyboardists, or percussionists.
Portable digital pianos, for the sake of lower production cost, were often equipped with a less complex system for the weighted keys. As a result, the feel of the keys is usually much less realistic than other digital pianos. However, it still retain the emulated weight mechanism (lower keys are heavier than higher ones), though not as precise as more expensive pianos. However, certain models include synthetic ivory-like keys as opposed to standard plastic keys.
The introduction of the electric bass in jazz fusion, as in the rock world, helped bassists play in high-volume stadium concerts with powerful amplifiers, because it is easier to amplify the electric bass than the double bass (the latter is prone to feedback in high-volume settings). The electric bass has both an accompaniment and a soloing role in jazz. In accompaniment, the bassist may perform walking basslines for traditional tunes and jazz standards, playing smooth quarter note lines that imitate the double bass. It is called a walking bass line because of the way it rises and falls using scale notes and passing notes.
Once the basic parameters were established, I reached out to colleagues who are piano teachers or musical directors to get a sense of what models were in highest rotation in the professional world. I also played several models at the National Association of Music Merchants (NAMM) show in January. From there I searched through Amazon, Musician’s Friend, and Sweetwater for available models, then cross-checked that information with manufacturer websites and added anything that was missing. After considering all that information, I decided to limit the price to $500. That was high enough to include several quality-built keyboards that met all (or most) of the criteria without being too pricey. This gave me a list of 21 models from nine different companies.
The "Fender Bass" was a revolutionary new instrument for gigging musicians. In comparison with the large, heavy upright bass, which had been the main bass instrument in popular music, folk and country music from the early 1900s to the 1940s, the Fender bass could be easily transported to shows. The bass guitar was also less prone to unwanted feedback sounds when amplified, than acoustic bass instruments. In 1953 Monk Montgomery became the first bass player to tour with the Fender bass guitar, in Lionel Hampton's postwar big band. Montgomery was also possibly the first to record with the bass guitar, on 2 July 1953 with The Art Farmer Septet. Roy Johnson (with Lionel Hampton), and Shifty Henry (with Louis Jordan & His Tympany Five), were other early Fender bass pioneers. Bill Black, playing with Elvis Presley, switched from upright bass to the Fender Precision Bass around 1957. The bass guitar was intended to appeal to guitarists as well as upright bass players, and many early pioneers of the instrument, such as Carol Kaye and Joe Osborn, were originally guitarists.
Since 2011 German bass luthier Warwick built several fretless Thumb NT 7 basses for Jeroen Paul Thesseling, featuring a 34-inch (864 mm) scale with subcontra tuning F♯–B–E–A–D–G–C . Yves Carbonne developed ten- and twelve-string fretless subbass guitars. In 2017 a 13 string bass tuned Ab00–Gb–Db–B–E–A–D–G–C–F–Bb–Eb–Ab4 was built by Prometeus guitars giving the fullest range to a string instrument allowable by current string technology.