07_CM0340_MIDI - MIDI What is MIDI? No Longer Exclusively...

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253 JJ II J I Back Close MIDI What is MIDI? No Longer Exclusively the Domain of Musicians. Midi provides a very low bandwidth alternative on the Web: transmit musical and certain sound effects data also now used as a compression control language ( modified ) See MPEG-4 Section soon
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254 JJ II J I Back Close MIDI on the Web Very Low Bandwidth (few 100K bytes) The responsibility of producing sound is moved to the client: Synthesiser Module Sampler Soundcard Software Generated Most Web browsers can deal with MIDI.
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255 JJ II J I Back Close Definition of MIDI: A protocol that enables computers, synthesisers, keyboards, and other musical devices to communicate with each other.
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256 JJ II J I Back Close Components of a MIDI System Synthesiser/Sampler: It is a sound generator (various pitch, loudness, tone colour) Can use a variety of synthesis or Sample-based synthesis to make sound. A good (musician’s) synthesiser often has a microprocessor, keyboard, control panels, memory, etc. For our purposes we define a synthesiser as the tone generation unit . It has one or more MIDI INs and MIDI OUTs and/or USB/Firewire connectivity Can be software based these days so virtual midi connections.
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257 JJ II J I Back Close Sequencer: It can be a stand-alone unit or a software program for a personal computer. (It used to be a storage server for MIDI data. Nowadays it is more a software music editor on the computer. It has one or more MIDI INs and MIDI OUTs and/or USB/Firewire connectivity If sofware based virtual midi connections
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258 JJ II J I Back Close Components of a MIDI System (Cont.) Computer: Heart of a MIDI system Controls the scheduling, synchronisation and recording of all data. Sequencer usually software based and now part of larger applications that control all aspects of Audio and Midi — Digital Audio Workstation packages such as Cubase, Logic, Sonar, Live, Reason. Nowadays, includes many software synthesisers/samplers to make sounds in real time. Real time effects Control of Video also integral these days.
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259 JJ II J I Back Close Components of a MIDI System (Cont.) Midi Control Input Devices: Usually a Keyboard with additional control: sustain, pitch bend,modulation, aftertouch and other controllers Can be another musical device e.g. Customised Guitar, Wind Controller Can be just a bunch of controllers. Can be even more strange: Motion Capture , or virtual input or mind control!!
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260 JJ II J I Back Close Components of a MIDI System (Cont.) Midi Interfaces: Midi devices (still) need to connect to computer with some interface Midi Interface — USB or Firewire Often functionality bundled with Keyboard or controller Audio Interface via USB or Firewire common Even Wireless Keyboards
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261 JJ II J I Back Close Components of a MIDI System (Cont.) Midi Control Output Devices: Not just making sounds MIDI controls other things
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This note was uploaded on 01/26/2012 for the course CM 0340 taught by Professor Davidmarshall during the Fall '09 term at Cardiff University.

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07_CM0340_MIDI - MIDI What is MIDI? No Longer Exclusively...

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