Difference between revisions of "MIDI"

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* [[Silicon Systems MIDI Interface]]
 
* [[Silicon Systems MIDI Interface]]
 
* [[Mini Interface for connection to MK5 MIDI Keyboard]]
 
* [[Mini Interface for connection to MK5 MIDI Keyboard]]
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* [[DIY MIDI Interface from CPCAI magazine]]
  
 
== MIDI software for the CPC ==
 
== MIDI software for the CPC ==
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image:MIDI test ACU Feb1989 p3.jpg|[[Amstrad Computer User]] reviews MIDI on CPC (page 3/3)
 
image:MIDI test ACU Feb1989 p3.jpg|[[Amstrad Computer User]] reviews MIDI on CPC (page 3/3)
 
</gallery>
 
</gallery>
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== Presentation in CPCAI magazine ==
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 +
<gallery>
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image:MIDI CPCAI.jpg|[[CPC Amstrad International]] 2/1987 reviews MIDI on CPC (pages 16-22)
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</gallery>
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== DIY MIDI Interface from CPCAI ==
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 +
<gallery>
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image:MIDI Interface CPCAI.jpg|[[CPC Amstrad International]] 2/1987 published a DIY MIDI interface & software for CPC (pages 24-31)
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</gallery>
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== Weblinks ==
 
== Weblinks ==

Revision as of 09:29, 16 February 2014


Musical Instrument Digital Interface (MIDI)

Software Protocol

Basically transmits commands like key on, key off, plus pitch/volume parameters.

Write more...

Hardware Protocol

The data is transferred at 31250 bits per second, using 8-N-1 format (one start bit, eight data bits, no parity bit, and one stop bit). So far, the MIDI protocol is much similar to RS232, and many MIDI interfaces do actually use standard "RS232" UART chips. Differences to RS232 are:

  • The signals are transmitted as TTL levels (0V and 5V) (unlike +/-12V on RS232) with 5V reference voltage (unlike 0V on RS232)
  • The receiver should pass the TTL signal through an Opto-Isolator
  • The 31250 Hz baudrate isn't a standard RS232 rate
  • MIDI is one-directional (MIDI OUT implements only TX, no RX, and MIDI IN implements only RX, no TX)
  • There are no control signals like CTS/RTS/DSR/DTR used

Schematic

MidiElectricalSpecificationDiagram.gif

MIDI Interfaces for the CPC

MIDI software for the CPC

Presentation in ACU magazine

Presentation in CPCAI magazine

DIY MIDI Interface from CPCAI


Weblinks