Recording Techniques

  • Created by: Noxas
  • Created on: 02-12-19 09:28

Direct Injection

Direct Injection:

  • a DI box converts a signal at intrument level or line leval to microphone level
  • a DI box converts an unbalanced signal to a balanced signal
  • it gives a pure connection between the instrument and the audio interface
  • Active DI boxes require phantom power, passive DI boxes do not
  • often have a pad/attentuation switch
  • often have a link output so signal can be split between interface and amp
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Balanced/Unbalanced Cables


  • Two connector with two conductors each
  • two wires inside cable: the signal wire and the ground wire
  • example is guitar cable, identified by TS (tip-sleeve) 


  • three conductors, three wires: two signal and a ground.
  • Signal wires both send the signal, but one has polarity reversed
  • this creates silence, but when audio gear flips the signal back it cancels out the noise
  • giving a pure sound without noise
  • Balanced cables are identified by TRS (tip-ring-sleeve)
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Close Mic

  • close miking involves placing a mic <30cm from the source
  • the closer to the source, the higher the bass is (proximity effect)
  • On and Off axis are used in recording guitar amps
  • On axis gives a brighter sound and off axis dulls it a little
  • this can also be used for other instruments
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Stereo Mic


  • two cardioid mics, small diaphragm condenser
  • 90 degrees, not a huge stereo field
  • need to be panned hard left and right
  • few phase problems

Spaced Pair (AB):

  • omnidirectional mics, 50cm+ apart
  • greater ambience, poor mono compatability
  • potential for huge phase problems
  • need to be panned hard left and right

Mid-Side pair:

  • 1 cardioid and 1 figure of 8 condenser as close as possible
  • figure of 8 is at 90 degrees to source
  • adjustable stereo image
  • no phase problems
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