HEDD
has released HEDD Lineariser, free monitor
phase plugin VST/AU/AAX.
With the HEDD Lineariser® plugin, we
have created a unique solution for one of the most
challenging problems in the history of loudspeaker
designing: Linear Phase Response. What does it mean
and why will your HEDD studio monitors sound better
than ever?
Well, all loudspeakers regardless of
size or construction cause phase errors. This means
that not all frequencies leave the speaker at the
exact same point in time. This has to do with
physics: The fundamental relation between time and
frequency is expressed by the so-called Fourier
Transform, which explains that corrections in the
frequency domain will inevitably alter the phase
response – and vice versa. You can’t have both,
linear frequency and phase response at the same
time, at least not in an analog loudspeaker design.
The above said is true for complete
speakers as well as for some of its ingredients.
Think of a monitor as a complex network of different
filters. The voice coils for an example are low pass
filters in itself, and so is the volume of a
cabinet. A tweeter sends out high frequency material
significantly earlier than midrange and low
frequency drivers – another source for phase
problems. All these timely aberrations vary with
frequency and together they build the phase response
of the complete loudspeaker. Phase problems can make
a speaker’s stereo image sound somewhat mushy and
undefined.
