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How do I create a broadcast-ready audio description?

Once you have generated the text-to-speech output, you can start the automated mix. Your audio file is mixed with the original sound and then the volume is adjusted. The whole process only takes a few minutes!

How to create an automated mix

  1. Open your project.
  2. Scroll down to the “Files” section.
  3. Open the context menu of a “tts” file. *
  4. Select “Automated Mix”.
  5. Select the original audio track*.
  6. Select the voice output. *
  7. Select the preset for the mix.
  8. Optionally, you can also export only a short excerpt by entering a Start TC and an End TC.
  9. Click on “Start”.

* If you dont see any files of type “tts” in your list, ensure that you’ve already generated the text-to-speech output for your document (see previous chapter).

**If you have started the voice output several times before, make sure you select the correct file. The name of the file contains a date, and the list is sorted by date (the last generated voice output is at the top).

Download

We generate 2 audio files. By default, you need the file of type “mix”. The “adm” type is only relevant if you are using MPEG-H audio.

  1. Type “mix”
  2. Type “adm”

*Tip: You can repeat the mix with different settings if, for example, you are not satisfied with the volume adjustment or need several levels for different scenarios. There are no additional costs for this. Please also refer to the Billing chapter.

Optional audio uploads

It is possible to optimize the automated mix by providing better audio tracks

Original-Audio

The audio track in the uploaded video may not be of the best quality. You can therefore replace this audio before mixing.

  1. Scroll to the “Files” section in the project overview.
  2. Open the submenu of the original audio file (recognizable by the type “audio”).
  3. Click on “Replace audio file”.
  4. Select a file.
  5. Click on “Save”

Voice track

It is also possible to upload a voice track before mixing.

  1. scroll to the “Files” section in the project overview
  2. Click on “Upload voice”.
  3. Select a file.
  4. Click on “Save”

Custom presets

You can create custom presets for the mix.

  1. Open your profile.
  2. Scroll to the “Text-To-Speech & Automated Mix” section.
  3. Click on “Manage presets”.
  4. Click on “New preset”.
  5. Assign a name.
  6. Set parameters.
  7. Click on “Create”.

The following parameters are currently available:

  • Target Loudness (LKFS)
  • Bits Per Sample (BPS)
  • Clearance
  • Attack
  • Release
  • Shift
  • Shape
  • Static Attenuation
  • Lookahead
  • Integration Time
  • Absolute Gate
  • Relative Gate

Duplicate preset

  1. Click on the submenu of the preset.
  2. Select “Duplicate”.

Hint: You can duplicate one of the existing standard presets for the EU (EBU R 128) or USA (ATSC A/85) as a starting point. This way, useful default values are entered for the parameters and you only have to change the parts that are important to you. This is usually easier than developing a preset from scratch.

Delete preset

  1. Click on the submenu of the preset.
  2. Select “Delete”.

Create new video

If you want, you can also export the finished audio description as a new video. The audio track of your original video will be replaced.

  1. Scroll down to the “Files” section.
  2. Open the context menu of the generated audio track (type: “mix”).
  3. Select the “New Video” option.
  4. Select video and audio track. Note that there can be multiple versions here, depending on how many mixes you have created.
  5. Click on “Start.”

Again there will be a placeholder (type “mix_video”) in the “Files” section. Wait until the generation has finished and the file name appears.

Last Update: 2024/10/20

Audio Export
Audio Upload