Linear Phase Eq versus Minimum Phase Eq

A detailed tutorial on the differences between Linear and Minimum Phase topologies-how and when to use them.

Equalisation



Analogue equalisers (minimum phase) tend to colour the sound in a way that’s more complicated than simple frequency boosts and cuts, because they introduce phase shifts whereas linear phase equalisers have no phase shifts when boosting or cutting between low and high frequencies. In most mix scenarios we tend to opt for linear phase equalisation for surgical corrective tasks and minimum phase equalisation for colour.

However, that has changed over the years and we quite happily interchange one topology for another when performing either corrective or creative processes.

To fully understand how linear phase and minimum phase differ it is best to watch the video. I have made sure to simplify it and to show you every eventuality using both topologies. Watching the responses of both linear and minimum phase equalisers on a graph is a great visual way to understand what happens to the frequency response of each topology.

Plugin used in this video: FabFilter Pro Q2

Topics covered in this video are:

  • The differences between Linear and Minimum Phase Topologies
  • Zero Latency and Minimum Phase
  • Understanding Phase and Shifting/Response
  • Measuring Frequency Response
  • Measuring Harmonic Distortion
  • Cut versus Boost
  • Slopes and Q (bandwidth)
  • Using Analysers and Measuring
  • Peaking and Shelves