Academic Algorithmix Linear Phase Parametric EQ Red

Every mastering engineer knows that equalization of final complex mixes or orchestral recordings with stereo microphones is very critical and limited.

Any correction of a single instrument or vocal part influences other instruments and can negatively change their sound characteristics. This is because all classic equalizers change the phase of the fundamentals and harmonics and the phase shift is frequency dependent.

The Algorithmix Linear Phase Parametric EQ Red does not shift the phase. It only boosts or cuts the amplitude in a given frequency range. Consequently, you can apply much more boost without changing the sound character of your recording. Due our proprietary low-noise filter design in the frequency domain, the distortions (THD+N) are extremely low, ensuring crystal clear sound quality.

The Algorithmix Linear Phase Parametric EQ Red DirectX/VST PlugIn is unique in the world of audio components. Almost all parametric equalizers being used are implemented with filters that accomplish phase shift, e.g.: the original signal is remixed with its phase-shifted version. Because the amount of the phase shift is frequency dependent some cancellation or amplification at certain desired frequencies takes place. It works, but with a major disadvantage--the different signal components are spread all over time, so that the time relationship between harmonics in the processed signal is heavily affected. The result is that a nice sharp bass drum becomes slurred and muddy, and vocal tracks become strident or brittle. Algorithmix is proud to offer you a true remedy against difficult equalizing tasks--the Algorithmix Linear Phase Parametric EQ Red PlugIn, a linear-phase equalizer which can be handled exactly like its classic predecessors, but cannot be "heard".

Experts say that most of digital equalizers do not sound like their analog predecessors, especially when working with low sampling frequencies: 44.1 or 48kHz. Spectrum modifications in the high-frequency region sound as improperly balanced. The reason is so called frequency warping which makes the bells asymmetric and high shelving and high-cut filters much steeper as theoretically set up. To make the Algorithmix Linear Phase Parametric EQ Red analog sounding, special corrections have been applied to the original digital filters making them look exactly like their analog references.

The Algorithmix Linear Phase Parametric EQ Red features the Continuous Slope Filter^TM technology, proprietary to Algorithmix® and the only one of its kind, worldwide. Unusual flexible shelving and cut filters allow adjustment of any slope in the range from 0 to 24dB/octave.

The Algorithmix Linear Phase Parametric EQ Red better preserves the time relationships of harmonics in the original waveform. This translates to smoother top end, sweeter and bigger midrange, and a clearer more distinct bottom end as compared with phase-shift EQ. The resultant sound seems less processed, more like it occurred naturally in the air in front of the microphone. The mixes become clear and transparent, the instruments more defined and "realistic". You can boost lower frequency regions by even 10dB without mud or slush and with no loss of transients at all. You can remove the sibilance from a vocal with a sharp notch without affecting the whole mix like occurs when using analog or IIR-based digital EQ.

The Algorithmix Linear Phase Parametric EQ Red works in the frequency domain. It sounds a bit softer than his brother, Algorithmix Linear Phase Parametric EQ Orange. It perfectly performs with up to 384kHz and allows extended frequency setup up to 80kHz. These features make it perfectly applicable for high-resolution DSD post-processing, inclusive the ultrasonic region.
full discription on prod detail page including specs

Algorithmix Linear Phase Parametric EQ Red Features:
-flawless operation with up to 384 kHz sampling frequency, thus perfectly suitable for high-resolution DSD post-
  production
-equal delay for every frequency, independent of filter settings, perfectly preserving the time relationship of harmonics
  in the original signal
-no phase distortions and therefore no signal dispersion and transient smearing
-no unwanted sound coloration; more clarity, transparency, and definition
-extended center frequency setup up to 80 kHz covering ultrasonic range in DSD applications
-10 bands with eight freely assignable parametric filter types: classical with bell, low/high-shelf, low/high-cut and
  Continuous Slope Filter^TM with low/high-shelf, and low/high-cut
-adjustable Q-factor for shelving and cut filters
-extremely low-noise and low-distortion linear-phase filter algorithms
-Unlike many other digital PEQs, perfect emulation of analog filter characteristics: clearly perceptible when equalizing
  audio at low sampling frequencies: 44.1 and 48kHz
-Worldwide unique Algorithmix® proprietary Continuous Slope Filter^TM technology allowing shelving and cut filters with
  any intermediate slope (roll-off) in the range fro 6 to 24dB/octave, as well as a continuous slope adjustment below 6
  dB/octave, which is physically impossible with any classical filter technology
-extremely shallow shelving filters using the Continuous Slope Filter^TM technology for gentle brightening (highs) or
  enlarging (low) effects
-possibility to overlap several low-cut and high-cut filters to get desired brick wall characteristics
-resizable frequency-response display for high-precision adjustments
-parameter editing via numerical fields or directly on the graphical display
-automatic latency compensation (in Sequoia and Samplitude only)
-complete setup exchange among several simultaneously opened PlugIns
-all internal calculations with double floating-point accuracy (80 bits)

Currently compatible and tested DirectX/VST Host Applications

Sequoia DAW 7.0-9.x
Samplitude 7.0-9.x
Pyramix Virtual Studio 4.1-5.x
Adobe Audition 1-2.x
Cool Edit Pro 2.0
Sound Forge 4.0
Sony Sound Forge 7.0
Sadie 5.x
Wavelab 4.0-6
Nuendo 3
Cubase 4

Algorithmix Linear Phase Parametric EQ Red System Requirements:
Minimum configuration (one real-time DirectX/VST PlugIn loaded)

Windows® 9x/Me/NT4/2000/XP/Vista or 7
Pentium II 500 MHz
64 MB
1024x768 pixels resolution with true color (24bit or 32bit)
any compatible DirectX/VST Host Editor
USB port for hardware dongle (eLicenser/Syncrosoft or WIBU)

Recommended configuration (more than one real-time DirectX/VST PlugIn loaded)

Windows® 2000/XP/Vista or 7
Pentium IV or AMD Athlon XP with at least 1 GHz (resolution low), 3,6 GHz or faster (resolution Xtra)
512 MB
1280x1024 pixels resolution with true color (32bit is usually fastest)
any compatible DirectX/VST Host Editor
USB port for hardware dongle (eLicenser/Syncrosoft or WIBU)