# How can I add an AAC 2 channel audio track as default

**URL:** https://discussion.mcebuddy2x.com/t/how-can-i-add-an-aac-2-channel-audio-track-as-default/3958
**Category:** General Support / Questions
**Created:** [October 27, 2020, 7:43am UTC](https://discussion.mcebuddy2x.com/t/how-can-i-add-an-aac-2-channel-audio-track-as-default/3958 "2020-10-27T07:43:59Z")
**Posts on this page:** 1
**Showing post:** 4

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### Author: ![SystemIdleProcess](https://discussion.mcebuddy2x.com/user_avatar/discussion.mcebuddy2x.com/systemidleprocess/32/2560_2.png) [@SystemIdleProcess](https://discussion.mcebuddy2x.com/u/SystemIdleProcess)
#### Post date: [February 19, 2021, 3:23pm UTC](https://discussion.mcebuddy2x.com/t/how-can-i-add-an-aac-2-channel-audio-track-as-default/3958/4 "2021-02-19T15:23:35Z")

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I’ll take a stab at this and dissect the [FAQ](https://discussion.mcebuddy2x.com/t/25) strings.

> ffmpeg-audio=-map 0:1 -map 0:1 -c:a:0 aac -ab 192k -ac 2 -c:a:1 ac3 -ab 192k

1. ffmpeg-audio=  
This is for processing non-ac3 audio (unsure if that is on a track by track basis, if I have a file with AAC and AC3 do both lines get used?).

2. -map 0:1 -map 0:1  
I don’t know why this is needed to be honest

3. -c:a:0 aac -ab 192k -ac 2  
Make an AAC 192k stereo track of the source audio as audio track 0 in the output file.

4. -c:a:1 ac3 -ab 192k  
Make an AC3 192k track with the same number of channels as the source audio as audio track 1 in the output file.

> ffmpeg-audioac3=-map 0:1 -map 0:1 -c:a:0 aac -ab 384k -ac 2 -c:a:1 copy

1. ffmpeg-audioac3=  
This is for processing ac3 audio (again unsure if that is on a track by track basis, if I have a file with AAC and AC3 do both lines get used?).

2. -map 0:1 -map 0:1  
Still don’t know why this is needed

3. -c:a:0 aac -ab 384k -ac 2  
Make an AAC 384k stereo track of the source audio as audio track 0 in the output file.

4. -c:a:1 copy  
Make a copy of the source audio track as audio track 1 in the output file.

> ffmpeg-AudioOptimized=true

1. MCEBuddy should not try and modify these values.  
More info: [MCEBuddy - Advanced Settings, Commands and Tweaking](https://discussion.mcebuddy2x.com/t/mcebuddy-advanced-settings-commands-and-tweaking/30#audiooptimized)

I don’t know how to normalize the audio since you will need to have So in order to do what you would like to do I would think you would use the following:

```
ffmpeg-audio=-map 0:1 -map 0:1 -c:a:0 aac -ab 192k -ac 2 -c:a:1 ac3 -ab 160k
ffmpeg-audioac3=-map 0:1 -map 0:1 -c:a:0 aac -ab 192k -ac 2 -c:a:1 ac3 -ab 256k
ffmpeg-AudioOptimized=true

```

Hopefully that’s something to help you start experimenting with.

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