====== Minimum Phase ======

----
The phase of a measurement is usually not minimal phase, due to influence of the room (reflections).
REW can calculate via FFT the minimal phase from the frequency response.

==== Creating Minimal Phase ====
=== Method 1 ===

To create minimal phase copy for a measurement do the following steps:
  - Select the "All SPL" tab
  - Select the measurement that you want to create minimal phase for
  - Select "Actions" and "Measurement Actions"
  - Press "Minimum Phase Version"
This will create a new measurement with phase measurement replaced by a minimal phase version.
{{ :audio:rew:rew-min-phase1.jpg?600 |}}

=== Method 2 ===

To create minimal phase trace for a measurement do the following steps:
  - Select the "SPL & Phase" tab
  - Select "Actions"
  - Press "Generate Minimum Phase"
This will __not__ create a new measurement. But will add a minimal phase trace to the SPL.

{{ :audio:rew:rew-min-phase3a.jpg?600 |}}

==== Measurement phase before ====

{{ :audio:rew:rew-min-phase2a.jpg?600 |}}

==== Measurement phase after ====

{{ :audio:rew:rew-min-phase2b.jpg?600 |}}