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Forums     Discussions     Announces, Releases and Discussions Voxengo PHA-979 phase alignment plug-in

PHA-979 is a PC VST plug-in which allows you to apply an arbitrary phase shift to the program material.  What is meant by the phase shift here is a simultaneous shifting of all frequencies across the active frequency range of the signal by the given phase shift value.  This process does not harm the phase relations within the signal being processed.  For example, you can shift the phase of the signal by 90 degrees and then shift its phase by 180+90 degrees to get the original signal as a result.  In PHA-979, this is achieved by using a linear-phase design.

PHA-979 can be very useful during mixing sessions, especially when working with the program material recorded through the microphone.  In many cases this allows one to solve various phasing problems arising from the microphone placement chosen during tracking session.  In other cases this process may help one to align drums to each other and to align the bass to drums and vice versa bringing punch and time coherence not attainable by the time aligning alone.

Another possible use of PHA-979 is for making stereo-field adjustments.  These can be useful both in audio restoration applications and audio mixing.  For example, some synth instruments may create a too wide' stereo field which becomes a problem when the mixed stereo material is later converted to mono: those wide' instruments simply disappear.  By shifting one of the stereo channels--during mixing of the original instrument track--this problem can be resolved.

PHA-979 is a relatively CPU-consumptive plug-in with a considerable processing delay (latency).  This means that this plug-in is best used with audio host applications which offer a freeze-like function along with a plug-in delay compensation.

Voxengo PHA-979 features:

  • Arbitrary phase adjustments
  • Phase control for each channel
  • Two quality modes
  • Linear-phase design
  • "A-to-B" comparisons
  • Mono-to-Stereo, Stereo-to-Stereo processing
  • Sample rates up to 96 kHz supported
  • Native assembler DSP code

PHA-979 is currently available for introductory price of US$39.  For more information and downloads please visit the Voxengo web site:

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