<< Click to Display Table of Contents >> Navigation:  Nodes > Tasks > Audio Tools > Youlean Loudness Meter

 

Purpose

 

This node allows the automation of Youlean analysis, reporting, and normalization of audio files based on the selected presets, channel configuration, and loudness ranges configured by the user.

It consists on an integration with Youlean Loudness Meter application, typically used to find the true perceived loudness of any audio file, then preparing it for TV or streaming services.

Note: Requires to install (and license) Youlean Loudness Meter application.

You can watch an introductory tutorial about usage in Mistika Workflows here: https://youtu.be/WWyH_Oldks4

Note: It is highly recommended to use the templates provided in the Templates panel for learning this node, specially when wanting to send QC reports in automated way.

Once the node is configured with the ylm2 binary file path, the Preset and Channel Config pulldown menus will show the available options (but not before). In the case that custom presets were created, it will retrieve the list of the *.ylmpreset files located in the default saved path location.

The node can work in two different modes, depending on the activated toggles:

Generate Report will export the corresponding analysis results in the file format selected (.pdf, .png, .csv...)

Normalize will attempt to normalize the input file(s) when it is out of values of the QC ranges indicated.

In both modes, all files that do not accomplish with the ranges indicated in the QC, or that couldn't be normalized, will be placed in the 'failed' output connector.

In this way you can concatenate several Youlean Loudness Meter nodes, taking different approaches depending on the result of the previous analysis.

Please refer to the Template provided to learn more about it:

 

Inputs

 

Input: Input media files

 

Outputs

 

report: QC report

 

passed: Media files that passed the QC

 

failed: Media files not passing the QC

 

Standard properties

Object Name

Color

Bypass

Lock

code

 

Node specific properties

 

Preset: Select a preset.

 

Channel Config: Select audio channels configuration.

 

Generate report: Generate a QC report.

 

Normalize: Attempt to normalize the audio loudness.

 

Reporting (Report type, Reports Folder Path): If Generate Report is active, creates a QC report in the Reports folder path

 

Normalize

 

QC (Integrated Min/Max, Loudness Range Min/Max, Integrated Dial Min/Max, Loudness Dial Min/Max, Speech Content Min/Max, Average Dynamics Min/Max, Momentary Min/Max, Short-term Min/Max, True PEak (TP) Min/Max): Set ACCEPTABLE range values for the QC report. For more details see Youlean documentation .

 

Config

 

Threads: Parallel threads (number of Youlean Loudness Meter instances to run in parallel for faster performance)

 

Binary File Path: Where to find the Youlean executable program. If not found you will see an alert in the Validation Inspector panel. To solve it, check the installation path of your Youlean Loudness Meter application and put the execution path in this property.

 

 

Developer reference (Python - YouleanLoudnessMeter.[Property ID], API Rest - node/YouleanLoudnessMeter/property/[Property ID])