8 Step Sequencer

[Vespasiano Jilg]

The output of the sequencer could be sent to another synthesizer module, such as an oscillator or filter. If you sustained a single note while the step sequencer was active, the changing voltage, when assigned to the frequency of an oscillator, would produce a repeating sequence of changing pitches.

If you need more control over each step, you can usually set the desired number of steps in each beat as well. In other words, you can sub-divide 1/4 note steps into smaller note values for rolls, fills, and more. Particularly in modern hip hop production, hi-hats usually require a number of subdivisions to achieve things like 1/16 note triplet rolls we hear all the time trap beats.

Ultrabeat is a software instrument designed for drum and percussion programming. It features 25 individual voices, each with its own access to a fully-featured step sequencer. All 25 sequences can be combined to make a drum pattern.

Before you can use the Step Sequencer, you have to enable it using its on/off switch. From here, you can simply click the numbers in the sequencer row to enable or disable hits. Please note that Ultrabeat is a Logic Pro exclusive, thus only available if you own this DAW.

XO is a designed primarily for beat-making and drum sequencing. It conveniently identifies and collects one-shot samples stored anywhere on your computer or hard drives and sorts them by similarity. It then brings your samples of choice into a creative context that facilitates experimentation.

A music sequencer (or audio sequencer or simply sequencer) is a device or application software that can record, edit, or play back music, by handling note and performance information in several forms, typically CV/Gate, MIDI, or Open Sound Control, and possibly audio and automation data for digital audio workstations (DAWs) and plug-ins.[note 1][1]

The advent of Musical Instrument Digital Interface (MIDI) and the Atari ST home computer in the 1980s gave programmers the opportunity to design software that could more easily record and play back sequences of notes played or programmed by a musician. This software also improved on the quality of the earlier sequencers which tended to be mechanical sounding and were only able to play back notes of exactly equal duration. Software-based sequencers allowed musicians to program performances that were more expressive and more human. These new sequencers could also be used to control external synthesizers, especially rackmounted sound modules, and it was no longer necessary for each synthesizer to have its own devoted keyboard.

Many modern sequencers can be used to control virtual instruments implemented as software plug-ins. This allows musicians to replace expensive and cumbersome standalone synthesizers with their software equivalents.

Today the term "sequencer" is often used to describe software. However, hardware sequencers still exist. Workstation keyboards have their own proprietary built-in MIDI sequencers. Drum machines and some older synthesizers have their own step sequencer built in. There are still also standalone hardware MIDI sequencers, although the market demand for those has diminished greatly due to the greater feature set of their software counterparts.

Analog sequencers are typically implemented with analog electronics, and play the musical notes designated by a series of knobs or sliders corresponding to each musical note (step). It is designed for both composition and live performance; users can change the musical notes at any time without regarding recording mode. And also possibly, the time interval between each musical note (length of each step) can be independently adjustable. Typically, analog sequencers are used to generate the repeated minimalistic phrases which may be reminiscent of Tangerine Dream, Giorgio Moroder or trance music.

On step sequencers, musical notes are rounded into steps of equal time intervals, and users can enter each musical note without exact timing; Instead, the timing and duration of each step can be designated in several different ways:

Realtime sequencers record the musical notes in real-time as on audio recorders, and play back musical notes with designated tempo, quantizations, and pitch. For editing, usually "punch in/punch out" features originated in the tape recording are provided, although it requires sufficient skills to obtain the desired result. For detailed editing, possibly another visual editing mode under graphical user interface may be more suitable. Anyway, this mode provides usability similar to audio recorders already familiar to musicians, and it is widely supported on software sequencers, DAWs, and built-in hardware sequencers.

A software sequencer is a class of application software providing a functionality of music sequencer, and often provided as one feature of the DAW or the integrated music authoring environments. The features provided as sequencers vary widely depending on the software; even an analog sequencer can be simulated. The user may control the software sequencer either by using the graphical user interfaces or a specialized input devices, such as a MIDI controller.

The early music sequencers were sound-producing devices such as automatic musical instruments, music boxes, mechanical organs, player pianos, and Orchestrions. Player pianos, for example, had much in common with contemporary sequencers. Composers or arrangers transmitted music to piano rolls which were subsequently edited by technicians who prepared the rolls for mass duplication. Eventually consumers were able to purchase these rolls and play them back on their own player pianos.

The origin of automatic musical instruments seems remarkably old. As early as the 9th century, the Persian (Iranian) Banū Mūsā brothers invented a hydropowered organ using exchangeable cylinders with pins,[8] and also an automatic flute-playing machine using steam power,[9][10] as described in their Book of Ingenious Devices. The Banu Musa brothers' automatic flute player was the first programmable music sequencer device,[11] and the first example of repetitive music technology, powered by hydraulics.[12]

In 1206, Al-Jazari, an Arab engineer, invented programmable musical automata,[13] a "robot band" which performed "more than fifty facial and body actions during each musical selection."[14] It was notably the first programmable drum machine. Among the four automaton musicians were two drummers. It was a drum machine where pegs (cams) bump into little levers that operated the percussion. The drummers could be made to play different rhythms and different drum patterns if the pegs were moved around.[15]

In the 14th century, rotating cylinders with pins were used to play a carillon (steam organ) in Flanders,[citation needed] and at least in the 15th century, barrel organs were seen in the Netherlands.[16]

In the late-18th or early-19th century, with technological advances of the Industrial Revolution various automatic musical instruments were invented. Some examples: music boxes, barrel organs and barrel pianos consisting of a barrel or cylinder with pins or a flat metal disc with punched holes; or mechanical organs, player pianos and orchestrions using book music / music rolls (piano rolls) with punched holes, etc. These instruments were disseminated widely as popular entertainment devices prior to the inventions of phonographs, radios, and sound films which eventually eclipsed all such home music production devices. Of them all, punched-paper-tape media had been used until the mid-20th century. The earliest programmable music synthesizers including the RCA Mark II Sound Synthesizer in 1957, and the Siemens Synthesizer in 1959, were also controlled via punch tapes similar to piano rolls.[17][18][19]

Additional inventions grew out of sound film audio technology. The drawn sound technique which appeared in the late 1920s, is notable as a precursor of today's intuitive graphical user interfaces. In this technique, notes and various sound parameters are triggered by hand-drawn black ink waveforms directly upon the film substrate, hence they resemble piano rolls (or the 'strip charts' of the modern sequencers/DAWs). Drawn soundtrack was often used in early experimental electronic music, including the Variophone developed by Yevgeny Sholpo in 1930, and the Oramics designed by Daphne Oram in 1957, and so forth.

Clavivox, developed since 1952, was a kind of keyboard synthesizer with sequencer.[verification needed] On its prototype, a theremin manufactured by young Robert Moog was utilized to enable portamento over 3-octave range, and on later version, it was replaced by a pair of photographic film and photocell for controlling the pitch by voltage.[22]

The step sequencers played rigid patterns of notes using a grid of (usually) 16 buttons, or steps, each step being 1/16 of a measure. These patterns of notes were then chained together to form longer compositions. Sequencers of this kind are still in use, mostly built into drum machines and grooveboxes. They are monophonic by nature, although some are multi-timbral, meaning that they can control several different sounds but only play one note on each of those sounds.[clarification needed]

In Japan, experiments in computer music date back to 1962, when Keio University professor Sekine and Toshiba engineer Hayashi experimented with the TOSBAC computer. This resulted in a piece entitled TOSBAC Suite.[32]

In 1965,[33] Max Mathews and L. Rosler developed Graphic 1, an interactive graphical sound system (that implies sequencer) on which one could draw figures using a light-pen that would be converted into sound, simplifying the process of composing computer-generated music.[34][35] It used PDP-5 minicomputer for data input, and IBM 7094 mainframe computer for rendering sound.

Also in 1970, Mathews and F. R. Moore developed the GROOVE (Generated Real-time Output Operations on Voltage-controlled Equipment) system,[36] a first fully developed music synthesis system for interactive composition (that implies sequencer) and realtime performance, using 3C/Honeywell DDP-24[37] (or DDP-224[38]) minicomputers. It used a CRT display to simplify the management of music synthesis in realtime, 12bit D/A for realtime sound playback, an interface for CV/gate analog devices, and even several controllers including a musical keyboard, knobs, and rotating joysticks to capture realtime performance.[34][38][35]

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