Review #6 - MIDI Theory (Stack #34502)
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| What does MIDI stand for? | Musical Instrument Digital Interface
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| What does MIDI do? | It allows communication between midi-capable devices.
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| Name the 3 MIDI ports and describe their function. | IN - receives data
OUT - transmits data
THRU - passes data received at devices IN port
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| Does the MIDI system transmit digital audio data or analog signal? | Neither - it carries no audio, only MIDI data.
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| Over how many channels is MIDI transmitted? | 16
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| What device records, plays back and edits MIDI data? | A MIDI sequencer
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| What do we call a MIDI instrument that can play multple programs, each assigned to its own MIDI channel? | Multi-timbral
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| What is a MIDI workstation? | A multi-timbral sampler or synth with a built-in sequencer
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| What sequencer fuunction is used to shift MIDI data to the closest available rhythmic value? | Quantization
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| What may be good about quantization? | It corrects timing errors
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| What may be bad about quantization? | It removes the human feel.
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| What do we call the device needed to input/output MIDI when using a software sequencer? | A MIDI interface
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| How can we allow the use of more than 16 channels? | An interface with multiple outs
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| What is tempo and how is it measured? | The rate or speed of a performance and is measured in beats per minute (BPM)
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| If we want to automate a mix of MIDI instruments or tracks recorded in the computer, must we use a mixing console with automation? | No, the program usually has its own automation features.
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| What do we call a synth or sampler that is a program run in a computer? | Virtual or soft synth/sampler
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| What do we call a synth or sampler that is self-contained? | A hardware synth/sampler
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| What is an audio interface or sound card? | A method of inputting/outputting audio to and from a computer.
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| What do we call the delay produceed between the time MIDI or audio is input and the time we hear the output? | Latency
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| What is usually used to sync sequencers to multitracks? | MIDI Time Code
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| What do we usually call the creation of a mix file within the sequencer/hard disk recorder? | Exporting or bouncing
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| What is a cycle? | A complete change in air pressure or voltage
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| What do we call the number of times per second a waveform completes a cycle? | Frequency
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| What do we call the speed at which a waveform travels through a medium? | Velocity
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| What is wavelength? | the distance it takes for a waveform to complete a cycle
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| What do we call the amount af change in sound or signal's intensity? | Amplitude
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| What is harmonic content? | The relative number and amplitude of overtones and harmonics contained in a sound (balance of frequencies in a sound)
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| What describes how a waveform's characteristics change over time? | Envelope
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| What do we call the time relationship of a waveform to a known time reference? | Phase
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| What do we call changes in atmoshpheric pressure that occur from 20 to 20,000 times/sec.? | Sound
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| What is audio signal? | Changes in voltage that represent sound.
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| What do we call the visual representation of how sound changes air pressure or signal changes voltage? | A Waveform
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| What is a sampler? | A digital recording and playback device with real-time control of pitch.
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| Into what type of memory does the sampler generally record? | RAM
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| What sampler function removes an unwanted part from beginning or end of sample? | Trim or Truncate
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| What sampler function repeats all or part of a sample? | Loop
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| How much of a copyrighted source may be sampled and used without the owner's permission? | None
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