1 / 15

Physics 1251 The Science and Technology of Musical Sound

Physics 1251 The Science and Technology of Musical Sound. Unit 4 Session 41 MWF MIDI. Physics 1251 Unit 4 Session 41 MIDI. What is the maximum frequency that can be represented by data that was digitized at a sampling rate of 10 kHz?. By the Nyquist Criterion: f max = ½ R Or 5 kHz.

Download Presentation

Physics 1251 The Science and Technology of Musical Sound

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Physics 1251The Science and Technology of Musical Sound Unit 4 Session 41 MWF MIDI

  2. Physics 1251 Unit 4 Session 41 MIDI What is the maximum frequency that can be represented by data that was digitized at a sampling rate of 10 kHz? By the Nyquist Criterion: fmax = ½ R Or 5 kHz.

  3. Physics 1251 Unit 4 Session 41 MIDI 1′ Lecture: • MIDI is the acronym for “Musical Instrument Digital Interface.” • MIDI is a control protocol that uses binary codes to remotely control electronic musical instruments. • MIDI uses a current loop to communicate in which current flowing means “0” and no current means “1.” • The Electronic wind instrument (EWI), Electronic Valve Instrument (EVI) and Electronic String Instrument (ESI) use MIDI for control.

  4. Physics 1251 Unit 4 Session 41 MIDI 80/20Digitization is the process of converting a waveform into a series of binary numbers that represent the amplitude of the signal at equal intervals of time. Analog Waveform Digitized Waveform Pressure [1000]2[0100]2[0010]2[0001]2 Binary Coded Data

  5. Physics 1251 Unit 4 Session 41 MIDI 80/20MIDI (1982) sends, not a digitized wave form, but rather a binary coded performance message to control electronic instruments (synthesizers). Master MIDI Out Slave

  6. Physics 1251 Unit 4 Session 41 MIDI MIDI—Physical: A five pin connector labeled “MIDI Out,” “MIDI In,” or “MIDI Thru.” Communication is via current. MIDI Out MIDI In Communication via current:current = 0, no current = 1

  7. Physics 1251 Unit 4 Session 41 MIDI MIDI—Physical: A five pin connector labeled “MIDI Out,” “MIDI In,” or “MIDI Thru.” Communication is via current.

  8. Physics 1251 Unit 4 Session 41 MIDI MIDI Physical: A MIDI chain can be assembled of up to 64 channels [0000]2 to [1111]2. MIDI Out MIDI Thru Channel 00 01 02 03 04

  9. Physics 1251 Unit 4 Session 41 MIDI MIDI Coding: A MIDI command is a word of three 8-bit bytes—status and 2 data bytes. Example: Status Data Data [10010100] [00111100] [011111111]: {09, 04} {060} {255} Note on, C4 Speed 255,(hardest) Channel 04 100101 00 001111 00 01111 1111

  10. Physics 1251 Unit 4 Session 41 MIDI 80/20A MIDI command is a binary code that follows a prescribed syntax and grammar. Example: Status Data Data [10000100] [00111100] [011111111]: {08, 04} {060} {xxx} Note off, C4 Irrelevant Channel 04 100001 00 001111 00 01111 1111

  11. Physics 1251 Unit 4 Session 41 MIDI MIDI Instruments: Electronic Wind Instrument (EWI) MIDI signals: Note, pressure, lip

  12. Physics 1251 Unit 4 Session 41 MIDI MIDI Instruments: Electronic Valve Instrument (EVI)

  13. Physics 1251 Unit 4 Session 41 MIDI MIDI Instruments: Electronic String Instrument (ESI) Janos Warren Bond—Electric Strad

  14. Physics 1251 Unit 4 Session 41 MIDI MIDI Instruments: Gesture Instruments (GI)h “The Glove” Prof. Butch Rovan

  15. Physics 1251 Unit 4 Session 41 MIDI Summary: • MIDI is the acronym for “Musical Instrument Digital Interface.” • MIDI is a control protocol that uses binary codes to remotely control electronic musical instruments, where a current loop is used to communicate • The Electronic wind instrument (EWI), Electronic Valve Instrument (EVI) and Electronic String Instrument (ESI) use MIDI for control.

More Related