Digital pianos typically use analog sensors for its keyboard action, as opposed to digital sensors of a regular keyboard and synthesizer. These sensors notably works in a similar way to those used in analog joysticks found on video game controllers, in which they the velocity input is converted from the key movement as well, not just the initial pressure of the key sensor.
Five strings usually tuned B0–E1–A1–D2–G2, providing extended lower range. Another common tuning on early 1970s five-string basses added a high note instead of a low note: E–A–D–G–C, known as tenor tuning. This tuning is still popular among jazz and solo bassists. Other tunings, such as C–E–A–D–G are rare. Some bassists like C as the lowest pitch because that's the lowest note on an upright bass with a C, and C is a common note in a few popular keys C (e.g., C major, G major, F major). Some players may detune the lowest string to B♭ or A. B♭ is common for bassists who play in brass bands, as B♭ is an important and common key for this type of ensemble. Relative to a four-string bass, the fifth string provides a greater lower range (with a low B, C, or A) or a greater upper range (with a high C or B is added) and provides more notes for any single hand position. The earliest five string was created by Fender in 1965. The Fender Bass V used the E–A–D–G–C tuning, but was unpopular and discontinued in 1970. The type of low B five-string was created by Jimmy Johnson as a custom instrument in 1975. He bought an E–A–D–G–C 5-string Alembic bass, replaced the nut, and used a new, thick low B string from GHS. Steinberger made a 5-string headless instrument called the L-2/5 in 1982, and later Yamaha offered the first production model as the BB5000 in 1984.
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.
Some bassists use other types of tuning to extend the range or get other benefits, such as providing multiple octaves of notes at any given position, or a larger tonal range. Instrument types or tunings used for this purpose include basses with fewer than four strings (one-string bass guitars, two-string bass guitars, three-string bass guitars [tuned to E–A–D]) and alternative tunings (e.g., tenor bass).
On modern band and orchestral drums, the drumhead is placed over the opening of the drum, which in turn is held onto the shell by a "counterhoop" (or "rim"), which is then held by means of a number of tuning screws called "tension rods" that screw into lugs placed evenly around the circumference. The head's tension can be adjusted by loosening or tightening the rods. Many such drums have six to ten tension rods. The sound of a drum depends on many variables—including shape, shell size and thickness, shell materials, counterhoop material, drumhead material, drumhead tension, drum position, location, and striking velocity and angle.
Three sounds (Grand Piano Concert, Grand Piano Modern, and Elec. Piano 1) have dedicated buttons on the control panel. Selecting any of the other 15 sounds requires the player to press the Function button and a corresponding piano key labeled with the name of the sound, such as Vibraphone or Jazz Organ. The keys used for instrument selection are in the middle of the keyboard, starting at middle C, for easy accessibility. Some other keyboards that use this selection method have the selection keys assigned to the bottom octave of the keyboard, which can make changing sounds a bit more difficult because you have to look and reach down to the far left end of the keyboard. If you have a library of sounds on your computer, the Casio Privia PX-160 can be used as a controller by connecting it to your computer via USB.
I then set out to a few local Los Angeles music stores to get my hands on some keys, talk to the store employees who work around these instruments every day, and start to whittle down the list. After contacting manufacturers to request samples and/or to get suggestions on pianos that might better fit our guidelines (or, in one case, to inform us of a model that was being discontinued), the list was narrowed down to seven keyboards.