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MIDI Theory Study Guide
MIDI Theory
33
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Not Applicable
03/29/2008

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Term
What is MIDI?
Definition
Musical Instrument Digital Interface
Term
What does MIDI do?
Definition
Allows communication between MIDI capable devices
Term
Name three MIDI ports:
Definition
IN: Receive
OUT:Transmits (Sends)
THRU: Passes data at devices IN port
Term
Does the MIDI system transmit digital audio data or analog audio?
Definition
No Neither – MIDI data only
Term
Over how many channels is MIDI transmitted?
Definition
16 Channels
Term
What records, edits and plays back MIDI?
Definition
MIDI Sequencer
Term
What do we call a MIDI instrument that can playback that can play multiple programs?
Definition
Mulit-timbral
Term
What is a MIDI workstation?
Definition
A multi-timbral synth or sampler with a built in sequencer
Term
What sequencer function is used to shift MIDI data to the closest rhythmic value?
Definition
Quantization
Term
What may be good about Quantization? And what may be bad?
Definition
Corrects timing errors. Removes human “feel”
Term
What do we call the device needed to input/output MIDI when using software?
Definition
MIDI Interface
Term
How can we allow for more than 16 MIDI channels?
Definition
Multiple Outputs
Term
What is tempo and how is it measured?
Definition
The rate or speed of a performance. BPM (Beats Per Minute)
Term
If we want to automate a mix of MIDI instruments must we have a mixing console with Automation?
Definition
NO. MIDI Information can send signal to different parameters controlling when/what to do.
Term
What do we call a synth that is a program?
Definition
Soft-Synth of Virtual Instrument
Term
What do we call self contained synthesizer?
Definition
Hardware Synth
Term
What is an audio interface or soundcard?
Definition
Inputs and Outputs into a computer
Term
What do we call the delay of audio from the time of performance to the time we hear it in the monitors?
Definition
Latency
Term
What is used to sync two or more sequencers together?
Definition
MIDI Clock
Term
What do we use to sync a MIDI sequencer to a Multi-Track?
Definition
MIDI Time Code (MTC)
Term
What is cycle of a sound or waveform?
Definition
A complete change in air pressure or voltage
Term
What do we call the number of times per second a waveform completes a cycle?
Definition
Frequency
Term
What do we call the speed at which a waveform travels?
Definition
Velocity
Term
What is wavelength?
Definition
The distance it takes for a waveform to complete its cycle
Term
What do we call change of intensity?
Definition
Amplitude
Term
What is harmonic content?
Definition
The relative number and amplitude of overtones and harmonics contained in a sound
Term
What describes a waveform’s characteristics over time?
Definition
Envelope
Term
What do we call the time relationship of a waveform to a known reference?
Definition
Phase
Term
What is an audio signal?
Definition
Changes in voltage that represent sound
Term
What do we call the visual representation of sound or signal?
Definition
Waveform
Term
What are the three types of instruments?
Definition
Acoustic, Electric, Electronic
Term
What synth method is based around “carving” away at a sound?
Definition
Subtractive
Term
What word describes a synth capable of playing more than one note?
Definition
Polyphonic
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