1. IV.3 Communication
IV.3.1 (We Nov 01) MIDI

2. instrumental- interface
MIDI = MusicalInstrumentDigitalInterface
gestures l h e
sound events
instrumental- interface
instrumentalize
„thaw“ 
More precisely, performance is a transformation P from the symbolic reality of the score to the physical reality of sounds (a quarter note is not determined in its physical duration, only the metronome yields the relation between symbolic reality and physical reality).
The mathematical analysis of tempo and pitch transformations shows that the performance transformation P can be described by a performance vector field, as shown to the left in the symbolic parameter space.
Essentially, performance is calculated via integration of such performance vector fields, much as the time is calculated via integration of the tempo curve.
In this language, performance operators are built in order to produce new performance fields from the old ones inherited from the relative mothers.
Standard MIDI file
score
analysis

3. 31‘250 Bits per second ~ 1 MegaBit/32 per second (5mA) ~ 32 sec/Bit
IN THRU OUT
three port types
More precisely, performance is a transformation P from the symbolic reality of the score to the physical reality of sounds (a quarter note is not determined in its physical duration, only the metronome yields the relation between symbolic reality and physical reality).
The mathematical analysis of tempo and pitch transformations shows that the performance transformation P can be described by a performance vector field, as shown to the left in the symbolic parameter space.
Essentially, performance is calculated via integration of such performance vector fields, much as the time is calculated via integration of the tempo curve.
In this language, performance operators are built in order to produce new performance fields from the old ones inherited from the relative mothers.
(NAMM) National Association of Music Merchants convention 1983

4. MIDI Specification: https://www.midi.org/
Expression
Signification
MIDI Specification:
More precisely, performance is a transformation P from the symbolic reality of the score to the physical reality of sounds (a quarter note is not determined in its physical duration, only the metronome yields the relation between symbolic reality and physical reality).
The mathematical analysis of tempo and pitch transformations shows that the performance transformation P can be described by a performance vector field, as shown to the left in the symbolic parameter space.
Essentially, performance is calculated via integration of such performance vector fields, much as the time is calculated via integration of the tempo curve.
In this language, performance operators are built in order to produce new performance fields from the old ones inherited from the relative mothers.
Content
Message Hierarchy

5. MIDI Message Syntax What? Who? How? 10 Bit Words: 320 sec/word
Statusbyte
1st Databyte
2nd Databyte
Stastusbit
Databit
Note-On Message
Channel (5)
Note Number (60)
Velocity (61)
10 Bit Words: 320 sec/word
Startbit = 0
Stoptbit = 0

6. MIDI Message Hierarchy
System
single musicians
all musicians
the entire system

7. MIDI Channel Voice Statusbyte Databyte Message Description Statusbyte
1st Databyte
2nd Databyte
Stastusbit
Databit
Note-On Message
Channel (5)
Note Number (60)
Velocity (61)

8. Standard MIDI File ............................ Statusbyte
Delta Time in Ticks = 480 per quarter note
Off of first note and On of second note
Statusbyte
1st Databyte
2nd Databyte
Stastusbit
Databit
Note-On Message
Channel (5)
Note Number (60)
Velocity (61)