Template:MIDI
Contents
MIDI
MIDI - Musical Instrument Digital Interface
Harmony central MIDI page What is MIDI?
Evolved out of trigger signals between synthesizer modules
MIDI is a serial connection between devices. 8 bit words.
One cable 16 channels - each device or voice of a device listens to one channel and only responds to or sends information on that channel
Some devices have more than one voice which means that they can play more than one sound or bank of sounds at a time.
Different connections IN , OUT, THRU
IN
- input for MIDI communication
OUT
- outputs and MIDI signals origination in device
THRU
- Throughput for MIDI information not intended for the device
MIDI information
System - send system information Tempo - what tempo measured in ticks SMPTE - sync information Track - which midi track
Channel
- which midi channel to send message to
Note Number
- turns notes on and off
Velocity
- how hard a note is hit
Sustain
- how long to hold the note
After Touch
- how key way released
Pitch Bend
- to bend a pitch
Synthesis
Types of synthesis
additive - adding together different waveforms in order to synthesize more complex waveforms. Uses the Fourier theory that all complex waveforms are made up of sine waves. Therefore by adding together all the right sine waves and complex wave may be synthesized.
additive synthesis article
Granular synthesis
(adaptive) - changing existing sound samples (wave table)