Wireless MIDI PDF

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Författare: Björn Morgenthaler.
MIDI ist ein serielles Protokoll zur Übertragung von Steuerungsinformationen für zum Beispiel Synthesizer oder Effektgeräte.
Die Idee zu dieser Arbeit kam dem Autor, als in einer Probe seiner ehemaligen Band die MIDI Verbindung des Gitarristen zum wiederholten Male nicht ordnungsgemäß funktionierte: das Kabel, welches die MIDI Daten von der Steuerungseinheit zum Effektgerät transportieren sollte, war sehr anfällig und fiel ohne erkennbaren Grund immer wieder aus.
Im Rahmen dieser Arbeit wird das an Kabel gebundene Protokoll auf einen wireless Standard umgesetzt. Dies erfordert zunächst eine genaue Analyse
des MIDI Protokolls. Neben der Auswahl einer geeigneten Technologie (Bluetooth, Wireless LAN, Infrarot etc.), steht vor allem die Konzeption, Entwicklung und Evaluation einer prototypischen Implementierung im Vordergrund. Die hierzu benötigten Werkzeuge und Programmiersprachen werden ebenfalls in einem Auswahlverfahren ermittelt. Das Ergebnis ist ein lauffähiger Prototyp zur Übertragung von MIDI Daten über eine drahtlose Strecke.

Relevant discussion may be found on the talk page. This article is written like a personal reflection, personal essay, or argumentative essay that states a Wikipedia editor’s personal feelings or presents an original argument about a topic. This article may contain an excessive amount of intricate detail that may interest only a particular audience. A MIDI keyboard is typically a piano-style electronic musical keyboard, often with other buttons, wheels and sliders, used for sending MIDI signals or commands over a USB or MIDI 5-pin cable to other musical devices or computers connected and operating on the same MIDI protocol. When using a MIDI keyboard with a computer, class compliance must be taken into consideration.

MIDI keyboards that are class compliant should be recognized by any computer. While most MIDI keyboards produced in the 2010s are bus-powered, meaning their electrical power is supplied through the same USB connection that transfers MIDI data to the computer, some keyboards have the option of, or even require, using external power to operate. If using a traditional 5-pin MIDI connector instead of USB, the MIDI keyboard will likely require external power, as 5-pin MIDI connections cannot send the current needed to power a keyboard. The action of a keyboard is the internal mechanism by which the keys work in order to move and produce sound, or, in this case, MIDI data. Two major types of keyboard actions exist: those derived from traditional, European, key-based instruments and non-traditional, contemporary designs that allow for expanded playing possibilities. MIDI controllers in this category have keys meant to resemble those of a grand piano, pipe organ, or synthesizer.

Each of these action types is designed differently from the next, which, in turn, gives the action a particular „feel“ to the player and lends it to an ideal usage. Many examples of the above actions, other than the waterfall keys, will include a small lip that protrudes from the top of the distal end of the white keys. This is emulating a customary design detail found on acoustic piano keys. Keyboards with any type of hammer action are most likely to display this lip. Most of these traditional key keyboards determine the attack velocity, sustain, and release of a note based on a calculation made between two sensors in each key. Some high-end keyboards now feature triple sensors, claiming improved accuracy in the tracking of key movement, which could translate into a more detailed, and perhaps more expressive, performance.

Some MIDI keyboards are capable of sending aftertouch data, which can be assigned to a variety of effects, including: vibrato, pitch bends, and volume swells. Keyboards can be equipped with channel or polyphonic aftertouch. Not all MIDI keyboards utilize variations on the traditional piano-style action. One example of a MIDI keyboard with a non-traditional action is the Continuum Fingerboard, which is based on a „fretless“ type keyboard interface, enabling portamento style note changes at will during play. An illustration of the Continuum Fingerboard.

The Roli Seaboard line of MIDI keyboards has soft, squishy keys. All that information can then be used to control the behavior of a digital instrument. MIDI keyboards come in a wide range of sizes and number of keys, each with their own benefits and drawbacks. Generally speaking, some sizes are more common while others are less common, both in online stores and in bricks and mortar music stores. A 25-key MIDI controller used to trigger various synth modules. 37-key: compared to 49-key keyboards, these are more compact and easy to carry.

76-key: compared to 88-key keyboards, these are more compact and easy to carry. Most 25-key through 49-key keyboards come equipped with synth or semi-weighted actions. Most 49-key and 61-key keyboards come equipped with semi-weighted actions, but some may be found with hammer actions. Waterfall keys can be found occasionally on some 61-key and 73-key keyboards. MIDI keyboards are usually full-size keys, like a grand piano.

Some smaller keyboards use minikeys, which are smaller. Some tiny keyboards have flat minikeys which are even smaller. Provided they are mapped, or mappable, to the correct function, these allow the player to access a DAW or alter the sound of an instrument patch without taking hands off the keyboard. MIDI keyboards often have the ability to accept foot controllers, of which there are four main types: piano pedals, expression pedals, stomp boxes, and organ-styie foot pedal keyboards. Sustain pedals: Momentary sustain pedals only send a message when the pedal is on or off.

Organ foot pedal keyboards: traditional organ pedal keyboards for those used to playing Hammond B3’s or church organs. While they are intended to send MIDI values for organ bass notes, if they are hooked up to a DAW, the pedals can trigger chords or play a high-pitched melody. MIDI Keyboard Limits, an interactive animation by Michael Schreiber, The Wolfram Demonstrations Project, 2007. MIDI가 출현하기 전에는 별도의 풀 사이즈 키보드 네 대와 아웃보드 믹싱, 이펙터가 필요하였다.

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