Audio signal processing is a subfield of signal processing that is concerned with the electronic manipulation of audio signals. Audio signals are electronic representations of sound waves—longitudinal waves which travel through air, consisting of compressions and rarefactions. The energy contained in audio signals or sound power level is typically measured in decibels. As audio signals may be represented in either digital or analog format, processing may occur in either domain. Analog processors operate directly on the electrical signal, while digital processors operate mathematically on its digital representation.
An effects unit, effects processor, or effects pedal is an electronic device that alters the sound of a musical instrument or other audio source through audio signal processing.
An electric guitar is a guitar that requires external electric sound amplification in order to be heard at typical performance volumes, unlike a standard acoustic guitar. It uses one or more pickups to convert the vibration of its strings into electrical signals, which ultimately are reproduced as sound by loudspeakers. The sound is sometimes shaped or electronically altered to achieve different timbres or tonal qualities via amplifier settings or knobs on the guitar. Often, this is done through the use of effects such as reverb, distortion and "overdrive"; the latter is considered to be a key element of electric blues guitar music and jazz, rock and heavy metal guitar playing. Designs also exist combining attributes of electric and acoustic guitars: the semi-acoustic and acoustic-electric guitars.
Audio feedback is a positive feedback situation that may occur when an acoustic path exists between an audio output and its audio input. In this example, a signal received by the microphone is amplified and passed out of the loudspeaker. The sound from the loudspeaker can then be received by the microphone again, amplified further, and then passed out through the loudspeaker again. The frequency of the resulting howl is determined by resonance frequencies in the microphone, amplifier, and loudspeaker, the acoustics of the room, the directional pick-up and emission patterns of the microphone and loudspeaker, and the distance between them. The principles of audio feedback were first discovered by Danish scientist Søren Absalon Larsen, hence it is also known as the Larsen effect.
Slapping and popping are ways to produce percussive sounds on a stringed instrument. They are primarily used on the double bass or bass guitar. Slapping on bass guitar involves using the edge of one's knuckle, where it is particularly bony, to quickly strike the string against the fretboard. On bass guitars, this is commonly done with the thumb, while on double bass, the edge of the hand or index finger may be used. Popping refers to pulling the string away from the fretboard and quickly releasing it so it snaps back against the fretboard. On bass guitar, the two techniques are commonly used together in alternation, though either may be used separately.
An instrument amplifier is an electronic amplifier that converts the often barely audible or purely electronic signal of a musical instrument into a larger electronic signal to feed to a loudspeaker. An instrument amplifier is used with musical instruments such as an electric guitar, an electric bass, electric organ, electric piano, synthesizers and drum machine to convert the signal from the pickup or other sound source into an electronic signal that has enough power, produced by a power amplifier, to drive one or more loudspeaker that can be heard by the performers and audience.
A guitar amplifier is an electronic device or system that strengthens the electrical signal from a pickup on an electric guitar, bass guitar, or acoustic guitar so that it can produce sound through one or more loudspeakers, which are typically housed in a wooden cabinet. A guitar amplifier may be a standalone wood or metal cabinet that contains only the power amplifier circuits, requiring the use of a separate speaker cabinet–or it may be a combo amplifier, which contains both the amplifier and one or more speakers in a wooden cabinet. There is a wide range of sizes and power ratings for guitar amplifiers, from small, lightweight practice amplifiers with a single 6-inch speaker and a 10-watt amp to heavy combo amps with four 10-inch or four 12-inch speakers and a 100-watt amplifier, which are loud enough to use in a nightclub or bar performance.
GarageBand is a software application by Apple for macOS, iPadOS, and iOS devices that allows users to create music or podcasts. It is a lighter, amateur-oriented offshoot of Logic Pro. GarageBand was originally released for macOS in 2004 and brought to iOS in 2011. The app's music and podcast creation system enables users to create multiple tracks with software synthesizer presets, pre-made and user-created loops, an array of various effects, and voice recordings.
An electric violin is a violin equipped with an electronic output of its sound. The term most properly refers to an instrument intentionally made to be electrified with built-in pickups, usually with a solid body. It can also refer to a violin fitted with an electric pickup of some type, although "amplified violin" or "electro-acoustic violin" are more accurate then.
Adrian Legg is an English guitar player who has been called "impossible to categorize". He plays custom guitars that are a hybrid of electric and acoustic, and his fingerstyle picking technique has been acknowledged by the readers of Guitar Player who voted Legg the "best acoustic fingerstyle" player four years in a row (1993–1996).
A pickup is an electronic device that converts energy from one form to another that captures or senses mechanical vibrations produced by musical instruments, particularly stringed instruments such as the electric guitar, and converts these to an electrical signal that is amplified using an instrument amplifier to produce musical sounds through a loudspeaker in a speaker enclosure. The signal from a pickup can also be recorded directly.
Chorus is an audio effect that occurs when individual sounds with approximately the same time, and very similar pitches, converge. While similar sounds coming from multiple sources can occur naturally, as in the case of a choir or string orchestra, it can also be simulated using an electronic effects unit or signal processing device.
In sound and music production, sonic artifact, or simply artifact, refers to sonic material that is accidental or unwanted, resulting from the editing or manipulation of a sound.
History of the Grateful Dead, Volume One is a live album by the Grateful Dead. It is their fourth live album and their ninth album overall. Released in July 1973 on Warner Bros. Records, it offers concert highlights recorded February 13 and 14, 1970 at the Fillmore East in New York City. Often known simply as Bear's Choice, the title references band soundman Owsley "Bear" Stanley. It was originally intended to be the first volume of a series.
A bass amplifier is a musical instrument electronic device that uses electrical power to make lower-pitched instruments such as the bass guitar or double bass loud enough to be heard by the performers and audience. Bass amps typically consist of a preamplifier, tone controls, a power amplifier and one or more loudspeakers ("drivers") in a cabinet.
An acoustic guitar is a musical instrument in the string family. When a string is plucked, its vibration is transmitted from the bridge, resonating throughout the top of the guitar. It is also transmitted to the side and back of the instrument, resonating through the air in the body, and producing sound from the sound hole. While the original, general term for this stringed instrument is guitar, the retronym 'acoustic guitar' – often used to indicate the steel stringed model – distinguishes it from an electric guitar, which relies on electronic amplification. Typically, a guitar's body is a sound box, of which the top side serves as a sound board that enhances the vibration sounds of the strings. In standard tuning the guitar's six strings are tuned (low to high) E2 A2 D3 G3 B3 E4.
Guitarist is a British monthly music-making magazine published by Future plc. First published in 1984, It is the longest-established European guitar-player magazine, and is currently the biggest-selling guitar magazine in the UK. The current editor Jamie Dickson, has had the position since late 2013. Each issue covers three areas: reviews, interview and technique. This may include reviews of newly released guitars, amplifiers and other equipment; interviews with famous and up-and-coming guitar players; and features on the guitar industry, news articles, playing technique with tablature. Guitarist's slogan was previously "The Guitar Player's Bible", before changing in 2012 to "The Guitar Magazine".
Solo Razafindrakoto known as Solorazaf is a Malagasy guitarist born in France. His roots are both situated in Madagascar. His musical style is very much influenced by these two different cultures and he then created a very personal musical style based on Malagasy traditional music.
Joseph Lukes Guitars was a stringed instrument manufacturing company based in London, England. They produced one steel-string acoustic guitar model known as the "Grand Concert" and a ukulele.
Electric music technology refers to musical instruments and recording devices that use electrical circuits, which are often combined with mechanical technologies. Examples of electric musical instruments include the electro-mechanical electric piano, the electric guitar, the electro-mechanical Hammond organ and the electric bass. All of these electric instruments do not produce a sound that is audible by the performer or audience in a performance setting unless they are connected to instrument amplifiers and loudspeaker cabinets, which made them sound loud enough for performers and the audience to hear. Amplifiers and loudspeakers are separate from the instrument in the case of the electric guitar, electric bass and some electric organs and most electric pianos. Some electric organs and electric pianos include the amplifier and speaker cabinet within the main housing for the instrument.
