Home         Download         Donate         Register         Forums         Help   
Stereo Tool 7.83 - Help - Phase rotation

Phase rotation section

Phase Rotation makes peak levels of asymmetrical sounds lower, to protect the compressors, limiters and clippers.

This protects the compressors, limiters and clipper against certain types of sounds that can easily distort. Examples are voices (especially female voices) and trumpets. They are very asymmetrical, with big spikes in one direction, and if there's also a bass sound present they tend to suffer from intermodulation distortion.

General panel

The most important Phase Rotation settings.

  • Enabled
    Enables Phase Rotation.

  • At start of processing
    Perform Phase Rotation before all other filters.

    By default, Phase Rotation is performed just before the clipper. If this setting is enabled, it is moved to just before Natural Dynamics and the AGC.

    At low latencies (1024 sampples and below), Phase Rotation is always done at the start of the processing chain.

Behavior panel

Setting that control how Phase Rotation works.

This is difficult to set up, and requires a lot of tweaking. The red spiral display shows the effect of the settings, except for that you'll have to play a lot of difficult sounds through it and check how they look and how well the clipper handles it.

  • Start frequency
    Phase Rotation works on sounds above this frequency.

  • Initial speed
    Controls how abruptly Phase Rotation starts to work above Start frequency.

    Lower values can cause a huge 'bump' in the phase response, which can be noticeable (some people even seem to like it).

  • Rotations
    The amount of "moving" sounds back and forward.

  • Smooth
    Smooths abrupt changes in the graph, and hence in the sound.

Low latency panel

Settings that affect phase rotator artifacts and delay in low latency modes.

These settings effect latencies at and below 1024 samples.

  • Low Latency Look back
    Amont of samples to look back to.

    A higher value increases the CPU load, but reduces artifacts.

  • Low Latency Look ahead (increases latency)
    Number of samples to look ahead.

    The number of samples to look ahead. This increases both CPU load and latency, but reduces artifacts.

Phase Delay section

Purposely introduce non-phase linear behavior.

This is thought to be useful to create certain bass sounds, but reports on the usefulness of this vary.

Phase Delay Equalizer panel

Configures the Phase Equalizer.

  • Enabled
    Enables the Phsae Equalizer.

  • Lookahead (better quality, more latency)
    Amount of lookahead.

    Higher values give a better sound, but also more latency.
This website is © Copyright 1999-2014 by Hans van Zutphen
Stereo Tool is shareware. You are free to give Stereo Tool to others, publish it on shareware CDs/DVDs, websites etc.