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PEQ 3000 User Manual
5.7 Real-Time Analyzer (RTA)
The Real-Time Analyzer in the PEQ 3000 is a highly detailed and informative ver-
sion of well-known and popular spectrum analyzers. This does not mean that we
present more information than you need, which is often seen with popular analyz-
ers on the market where the spectrum in especially the high frequencies nearly
looks like ‘grass’. In the same analyzers, there is often nearly no useful information
of benefit in the low frequencies.
In the PEQ 3000, and based on our Finalizer application that was launched in the
fall of 2019 at www.finalizer.com, we have gone a great step further to find the
right and useful information for the delicate and sometimes difficult task of EQ’ing
an instrument channel, a sub mix bus, or a full master track.
The PEQ 3000 features a High-Resolution, Constant-Q Real-Time Analyzer with
both Peak and RMS spectrum displays. The Peak curve will help you when the
signal is percussive and includes many transients, while the slower-moving RMS
curve will constantly keep you up to date on the average spectrum.
The frequency resolution is based on a constant-Q analysis. This makes it easier
to equally see details across the whole frequency spectrum, as opposed to having
too little information in the bass range and too much information in the treble
range (‘grass’). A constant-Q representation is also much closer to the “frequency
analysis” known from psychoacoustics to be performed by the cochlea in the inner
ear. This way, you will have just the right amount of information to perform the
EQ’ing task.
Note: to begin using the RTA, set the track to play in your DAW, and then press
“ANALYSE.” The RTA will then begin its spectral analysis of the incoming audio.
Initially, the default setting is for low latency. If a higher resolution is required,
then also press the “HI-RES” button. You will notice that the RTA graphs have
more detail.
Parameters
•
ANALYSE on/off (the default is on)
•
HI-RES on/off (the default is off). Note there is increased latency when
HI-RES is enabled, and there are finer details in the RTA display
RTA level, Mono vs Stereo
•
The PEQ 3000 RTA analyzer shows a summed Left + Right measure-
ment in Stereo operation
•
Mono: A mono (or single-channel) test tone has the same dB level on
the RTA as on the PPM meters, as expected
•
Stereo: The consequence of summing the left and right in stereo, is
that in-phase stereo signals are up to 6 dB higher on the RTA than the
individual left or right PPM levels
Default RTA (Low Latency)
In the default setting, the Real-Time spectrum is running with low audio latency,
which is expected of a minimum-phase EQ plug-in.
Real Time Analyser
(RTA) Controls
ANALYSE
RTA Peak Curve
RTA Average Curve
•
The upper curve line is a real-time peak analysis of the incoming audio
•
The lower “filled” curve is a moving-average real-time RMS analysis
HI-RES RTA (High Resolution)
When HI-RES is enabled, the RTA will continue its Constant-Q Equal Resolution per
octave, all the way to 20 Hz, making it possible to analyze bass frequencies to the
same precision as the high frequencies.
Real Time Analyser
(RTA) Controls
HI-RES ANALYSE
RTA Peak Curve
RTA Average Curve
Note: When enabling Hi-RES, the PEQ 3000 inserts a delay to compensate for the
calculation time. Depending on your DAW, you may, or may not, experience this
delay between when play is pressed to audio appearing. You will in this case, in all
DAWs, have this delay from input to output. For latency-sensitive applications you
should disable HI-RES.
Mid/Side or Left/Right operation
The PEQ 3000 features two Real-Time Analyzer engines when in Mid/Side or Left/
Right operation. This ensures that the analysis is constantly updated and instantly
ready when you switch from Mid to Side, for example.
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