ANALOG

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ANALOG

• Analog comes from the same root word as does
  analogous meaning similar or the same

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Similar

• In analog recording the waveform of the recording
  resembles or is similar or is analogous to the
  original sound source

3
Continuous

• The waveform of an analog recording is unbroken.
  That is, it is a continuous function that is made
  up energy changes over time that resemble the
  waveform of the original sound.

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2 Key Words

• SIMILAR
• CONTINUOUS

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Analog Recording Tape

• Base A thin film made of Mylar plastic
• Magnetic Coating tiny magnets of ferric oxide
• Top Coat The binder that adheres the magnetic
  particles to the base
• Back Coat A carbon film on the reverse side of
  the tape that reduces print through and static
  electricity

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PRINT THROUGH

• When one layer of magnetism is transferred to an
  adjacent layer
• Occurs only in analog recording
• Store tape tails out
• Back Coat

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Magnetic Energy

• Stored on tape in tiny magnets in regions called
  domains
• When magnets are random, flow of electrons (FLUX)
  produce an overall energy transfer of zero
• When we POLARIZE the domains, we force the
  magnets into patterns that store information
  about the amount of energy

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Analog Recorders

• Feed Reel (Supply Reel)
• Take-up Reel
• Tape Transport the system that moves the tape
  through the machine
• Tape moves left to right
• Transport Commands stop, play, record, rewind,
  fast forward
• TTL (Total Transport Logic)

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Recorder Features

• Capstan
• Pinch Roller
• Vari-Speed
• Tension Levers
• DC Servo Motor
• Magnetic Heads
• Standard Tape Speeds
• 7 ½ IPS, 15 IPS, 30 IPS

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ERP

• Erase
• Record
• Playback

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Selective Synchronization

• Temporarily converting the record head to
  function as a playback head
• Invented by Les Paul
• Used only in overdubbing

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FLUX

• The flow of electrons in a magnetic field

RELUCTANCE

• The resistance to the flow of electrons in a
  magnetic field

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Head Configurations

• Mono
• Stereo
• 4 Track
• Etc. Track

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OTHER TERMS

• Dropout
• Bias
• Wow Flutter
• Degaussing
• Calibration
• Head Alignment
• Tape Saturation
• Coercivity, Sensitivity, Retentivity