Stereo, 5.1 or multi-channel?

Eff is unique in that it can correctly handle multiple audio tracks, in many different ways. For example, the most common audio format in files is stereo, which of course is processed correctly within Eff. But what happens if there are four separate stereo pairs within the media file, and each file is a different language which potentially needs to be processed to a different countries loudness requirement? With Eff, this is simple. Eff can measure and correct different stereo tracks to different loudness specifications.

Eff has a flexible channel layout configuration page which allows the user to configure the behaviour of Eff when a given number of channels are present within a file.

To give an idea of Eff’s flexibility, look to the bottom of the screenshot, for the ‘Eight Channel Options’ section.

In the image, ‘5.1+stereo’ is selected. This means that Eff assumes that channels 1 to 6 are a surround grouping, and channels 7 & 8 are a stereo pair.
However if the groups were the other way around, with stereo on 1 & 2, and the 5.1 on 3 to 8, then you would need to select the next option shown in the image.
Other layout choices are available. Additionally, the right column shows ‘Active Channels’, and only those selected are analysed and corrected. You can use this to prevent the analysis and correction of an M&E track or other track that is not important.
People often ask what happens to silent tracks? Eff detects the silence and these tracks are automatically excluded from analysis and correction.


In some Post applications it is common to have individual WAV or AIFF files for each element of a 5.1 track. In Eff, we refer to this as Multifiles. Using Eff, you can open all six files, measure the combined loudness, and if required create new versions of all six files which comply with your loudness target.

The configuration section on the right of the above dialog lets Eff look for unique strings within filenames, so that instead of selecting each individual file, you point Eff at a folder of six files, and Eff correctly assigns each file into its place within the overall signal.


Watch this video for more information on Eff works with Multifiles


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