Corrine SeldenWashington Recording Connection

Dynamic Signal Processing Posted on 2017-03-13 by Corrine Selden

Here are a few highlights from what I learned about dynamic signal processing in Chapter 14:

  • The first commercially available compressor was released in the 1950s. 
  • Bill Putman was the designer of the first commercially-available audio compressor. 
  • Modern analog recording is a method of recording where signals are stored as a continual wave in or on the media, usually magnetic tape. 
  • In digital recording, sound signals are converted and stored as binary data. 
  • A compressor reduces dynamic range. 
  • An expander increases dynamic range. 
  • The threshold is the decibel point at which compression is intitiated. 
  • A compression ratio of 100:1 would be considered limiting. 
  • The ratio determines the amount of gain reduction of a compressor. 
  • The attack determines how quickly compression will initiate after the threshold is breached. 
  • The release determines how quickly gain reduction is reset after the signal drops back below the threshold. 
  • A De-Esser is used to remove sibilance. 
  • Multiband Compression involves processing one signal with different settings for frequency ranges present in the signal.
  • Serial Compressoin implies that the output of one compressor is being fed into the input of another compressor.
  • Parallel Compression implies that a signal is being split, and one half of the split signal is compressed separately using an aux send, and is then recombined with the original signal.  

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