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- Checking phase
- Amplitude statistics
- Frequency analysis
- Loudness metering
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From the book
Loudness metering
From the book
From the book
From the book
Loudness metering
Audition incorporates a version of TC Electronic’s ITU Loudness Radar, a plug-in that indicates peak and average loudness levels, as well as whether the levels conform to specific broadcast regulations. Explaining conformance to international broadcast regulations is beyond the scope of this book, but TC maintains the “Loudness Authority” website at www.tcelectronic.com/loudness, which offers a wealth of information on this topic.
The following describes how to use the ITU Loudness Radar plug-in from a general standpoint.
- With Audition still open to the Waveform Editor from the previous lesson, choose Window > Workspace > Reset “Mastering and Analysis.”
- Chose File > Open, navigate to the Lesson06 folder, and open the file EthnoWorld5.wav.
- Click the Effects Rack tab, click insert 2’s right arrow, and choose Special > Loudness Radar Meter. Choose the Radar Meter’s CD Master preset from the Presets drop-down menu, and then start playback.
- The outer dotted ring indicates the momentary loudness, like a standard level meter. As the “radar” follows the song over time, the concentric rings farther away from the center indicate louder signals. The Loudness Range (LRA) statistic describes the overall program material range, from softest to loudest; however, to exclude extreme levels from the overall result, the top 5% and lowest 10% of the total loudness range aren’t included in the LRA measurement. For more information on the ITU Loudness Radar’s statistics, refer to the website referenced at the beginning of this section.
- To see how changing dynamics alters the Radar display, click the Effects Rack tab, click insert 1’s right arrow, and choose Amplitude and Compression > Hard Limiter.
- Reset the ITU Loudness Radar by clicking its Resets Measurement button toward the window’s upper right.
- Start playback, and move the Hard Limiter’s Input Boost control to around +6dB. Note how most of the signal now hits the outer concentric band, and the Peak indicator lights up occasionally.
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