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Audio Multimeter - Pro Version - Details

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(stereo, 5.1 or 8-channel - depending on the version)
  • 9 different modes:
    • VU/SPPM
    • QPPM/SPPM +9 dBfs
    • QPPM/SPPM 0 dBfs
    • K-20/SPPM (Wide-range Music)
    • K-14/SPPM ('Pop' Music)
    • K-12/SPPM (Broadcast)
    • K-20 ITU/SPPM (Wide-range Music)
    • K-14 ITU/SPPM ('Pop' Music)
    • K-12 ITU/SPPM (Broadcast)
  • 3 decay times, bar peak hold, bar peak decay, and alphanumeric peak readout

Correlation Meter

The Correlation Meter shows the phase correlation between two audio channels. The display ranges from +1 to -1, respectively 0 to 180 degrees phase difference. If both channels are completely in phase, the meter will show +1 (0 degree). If completely out of phase, the meter will indicate -1 (180 degrees). The maximum in and out of phase values are displayed numerically. Maximum in phase values are shown in green, maximum out of phase values in red. Note that the numerical display is faster than the "needle".

Gonio Meter

The Gonio Meter (or stereo meter) displays the stereo amount of a 2-channel signal. Just as the correlation meter, it shows phase differences – but in a more precise way. If you get familiar with this instrument, you will be able to see the stereo amount of different frequencies or single instruments in a mix. The display consists of 2 diagonal axes, one for the left (L) signal, the other one for the right (R) one.

For a signal only appearing on the left channel, the Gonio Meter would display a line going from top-left to bottom-right. A signal that is panned completely to the right would form a diagonal line going from right-top to bottom-left. The same signal on the left and right channel (mono) leads to a vertical line. If the signals are completely out of phase (180°), a horizontal line is displayed. By default, the range between -45° and +45° is labeled.

FFT Analyzer

The FFT Analyzer shows the frequency content of an audio signal. The incoming signal is divided into single bands - and their level is displayed.

Different types of analysis windows can be chosen, display mode, input mode, display range and decay times can be set. The level is displayed in steps of 0.2 dB. At the top right of the analyzer window, the exact level and frequency at the cursor position are displayed.

  • 7 different types of (FFT) analysis windows - from "Rectangular" to "Hamming"
  • 3 different display modes (determining how white or pink noise is displayed by the analyzer)
  • snapshot function

RTA: Real Time Analyzer

The Real Time Analyzer (RTA) divides the audio spectrum into third-octave bands and displays the level of each of it. Contrary to the FFT analyzer, the RTA uses bandpass filters to divide the audio spectrum into frequency bands.

Spectral View

This spectrometer displays three parameters of an audio signal simultaneously: time (x-axis), frequency (y-axis) and level (color). It lets you observe the audio spectrum over a definable period of time.

Low levels are represented by a deep blue color, and the higher the levels are, the more the color display changes to light blue, green, yellow and then red – with all the graduations that lie between. This instrument is not scalable, but you can zoom in vertically by a factor of 2.

Loudness Meter

The LDN (Loudness) Meter displays the perceived loudness of audio signals. This bargraph instrument uses an algorithm developed by IRT (Institut für Rundfunktechnik) - which is the German Institute for Radio Broadcast Technologies. The algorithm takes into account all factors that influence the human perception of loudness. The meter displays LU, which stands for Loudness Units. The LDN meter can show momentary or short-term loudness according to EBU R-128.

EBU Loudness Meter

EBU Loudness Meterdisplays loudness (LU), loudness range & true peak levels. These values are shown graphically on a tachometer display as well as numerically at the bottom of the instrument, respectively below the middle of the scale ('max LU'). True peak levels are displayed numerically at the top right of the meter. "History time" and "Ray zoom" factor are displayed below the scale.

A loudness range can be defined, which is highlighted on the meter's scale. This range is called "Cool zone". If the loudness of the input signal is within the 'cool zone', you see a green smiley at the top left of the meter. If the incoming signal is out of this zone, you see an alert in form of a red arrow pointing downwards or a yellow arrow pointing upwards – depending on whether the signal's loudness is above or below the defined range. The scale of EBU Loudness meter is always arranged around the target loudness.

Surround Locator

The Surround Locator (only part of the surround version) lets you observe the total level in the surround field, its position, as well as phase relationship between audio channels in a 5.1 surround setup.

Besides level metering of the individual channels, it is important to get an overview whether your surround mix is well-balanced (level-wise in relation to the listener's position) and to see if there might be some phase problems between the 5 channels. The Surround Locator facilitates this task.

The display consists of a circle on which the speakers are arranged (left, right, center, left surround and right surround) – with the center speaker at 0º. The middle of the circle represents the listener's position.

All speakers positions are connected by lines on which the phase relationship between all channels is shown (in green for values less than 90º, in red for phase shifts greater than 90º). A blue ball represents the total level of the surround mix. The higher the overall level, the larger the ball gets. Its position shows you the level distribution in the surround field. The exact middle of the ball is shown by a small dot. A yellow ball in the middle of the blue ball represents the LFE ('Low frequency effects' or '.1') channel. The size of this ball grows according to the level of the LFE channel.

System requirements:

The system requirements depend on the version of PG-AMM you bought. The more instruments you plan to use simultaneously, the more CPU power Pinguin requires.

Feel free to download a demo version of the Pinguin Audio Meters to test it with your computer setup.

  • operating system: Windows 7, Vista, Windows XP, Windows 2000
  • CPU: minimum: 2.4 GHz Single Core or 1.6 GHz Dual Core
  • RAM: at least 2 GB
  • 16-32bit graphic card

  • operating system: OS X 10.4. or higher
  • CPU: minimum: 2.4 GHz Single Core or 1.6 GHz Dual Core
  • RAM: at least 2 GB
  • 16-32bit graphic card