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You have to make sure that All are the same.

Link to your Audio. Make sure you rt click and modify to be L R C LFE Ls Rs

 

Then the mixer tool has to be that within the seq

 

Then the QT export audio needs to be that way

 

Then QT will play correctly, but VLC will not.
The drop down menu on the left is the Sequence Mix Format button.
Your sequence can be Stereo, 5.1, or 7.1. You should choose 5.1 or else you would not be reading this wiki.

The drop down menu on the right is the Mix Mode Select button.

Audio Mix Mode and Monitoring Options

To hear a surround sound mix, you need surround sound hardware. If you don't have the hardware, the mix options will be grayed out. The hardware connects to the speakers through which your surround sound mix will play. Media Composer can use a third-party sound hardware, or you can use the Avid Artist I DNxIO hardware, which has an HDMI connector capable of transmitting surround sound to a receiver. You can also use the digital and analog connectors on the Avid Artist I DNxlO hardware. The mix mode sets your speaker layout so Media Composer sends the correct signals to the associated outputs on your hardware. The mix mode addresses the following questions :

• Do you have two, four , six, or eight speakers?

• How are your surround sound speakers connected to your hardware?

• How does a stereo sequence play back when you have 7.1 surround speakers?

• How does a 5.1 sequence play back when you only have two speakers? (This is probably you)


Monitor Mix button Controls how your system interprets audio values during playback:

• Stereo: Stereo sequences are output in stereo as expected. Surround sequences are folded down to stereo, rear and side channels are mixed at -3dB into the corresponding front left and right, center and LFE channels are panned to center. If you have four or more physical outputs, you can choose the output channel pair in Audio Project Settings.

• Mono: Pans all the currently monitored tracks to center and ignores pan effects.

• 4-channel LRCLfe - The four channels are Left, Right, Center, and Lfe (Low Frequency Effects) in that order. L, R, C, and Lfe are sent directly to their corresponding channels. Rear and side channels are mixed at -3dB into front left and right. Four-channel modes cannot be reassigned. Even if you have eight outputs, the four channel modes are always the first four.

• 4-channel LRCS - The four channels are Lef,t, Right, Center, and Surround, which is a single rear loudspeaker L, R, and C are sent directly to their corresponding channels. Lfe is mixed at -3dB into front left and right Rear channels panned into the single rear center. Side channels (side centers in a 7.1 mix) are panned between the single rear channel and the corresponding front channel.

• 4-channel Quadraphonic - The four channels are in four corners of the listening space, L, R, Ls Rs. Left, Right, Left Rear, and Right Rear are sent directly to their corresponding channels. Center, Left Center, and Right Center are panned to the centers of their corresponding speaker pairs. Lfe is mixed at -3dB into front left and right.

• 6-channel 5.1 Pro Tools, (L C R Ls Rs Lfe), and 5.1 SMPTE (L R C Lfe Ls Rs) Stereo sequences are output only to L and R, in the selected channel order. Surround 5.1 sequences have channels re-ordered to match the selected channel order. Surround 7.1 sequences, have their center side channels are panned to the center of their corresponding speaker pairs. If you have more than eight or more audio outputs, you can choose to start the 5.1 mix at position 1 or position 3 of any 8-channel group. See “Surround Monitoring” on page 584.

• 8-channel 7.1 Pro Tools, (L C R Lss Rss Lsr Rsr Lfe), and 7.1 EXT (L R C Lfe Lsr Rsr Lss Rss), and 7.1 SMPTE DS (L R C Lfe Lss Rss Lsr Rsr). Note Lsr and Rsr and left and right “surround rear”, Lss and Rss are left and right “surround side”. Stereo sequences are output only to L and R, in the selected channel order. Surround 5.1 and 7.1 sequences have channels re-ordered to match the selected channel order. Lss and Rss remain silent when playing 5.1 sequences. If you have 16 outputs, you can choose to start the 7.1 mix at position 1 or position 8. See “Surround Monitoring” on page 584.

• Direct out, Panning and master fader effects are ignored. Each track is mixed into one or more outputs according to the output assignments in the Audio Project Settings output pane. Stereo and surround tracks will be sent to multiple adjacent outputs, and the channels within surround tracks are re-ordered according to SMPTE or Pro Tools channel order conventions as selected.

When your sequence mix format is set to either 5.1 or 7.1, you will see that the Master output switches to display 6 or 8 audio meters. The order that these meters show the different output channels is set in the Audio Settings (found under the Settings tab of the Project Window). Since Media Composer v8.6 you can choose to monitor in ProTools or SMPTE order. We recommend SMPTE order (L, R, C, LFE, Ls, Rs)

Comparison of 5.1 Film and 5.1 SMPTE Mix Modes

Output5.1 Film5.1 SMPTE
A1Left frontLeft front
A2CenterRight front
A3Right frontCenter
A4Left SurroundLFE
A5Right SurroundLeft Surround
A6Low Frequency Effects (LFE)Right Surround
 
Now that you're familiar with the audio settings, lets export a 5.1 QuickTime movie. 

1. Open the SETTINGS TAB, and create a new Export setting by duplicating an existing one and renaming it

Audio Surround

"Audio 5.1 in QT" for example.

Don't know how to duplicate an export setting? Simply highlight any other export setting and press Command + D.

Don't know how to rename an export setting? Simply click on it's name and type.

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2. Open your custom setting and configure it as shown.

3. You will need to create custom settings which will open the Movie Settings window. In this, you'll click the SOUND SETTINGS button to open the Sound Settings window on the right.

4. In the Channels menu, select 5.1 (LR C LFE Ls Rs) which is the SMPTE setting.

5. The video settings can be H.264 which is normal for QuickTime.

6export setting (hopefully called "Audio 5.1 in QT" by now) by double clicking on the word Export next to your custom setting name.
 

3. Configure it as shown:

Video Format

1920x1080

Size to Fit

Scale from Legal to Full Range

Audio Format

5.1

Movie Settings

Video

Compression Type: Avid DNxHD Codec

Color Levels: RGB Levels

Resolutions: 1080p/23.976 DNxHD 115 8-bit

Audio

Format: Linear PCM

Channels 5.1 (L R C LFE Ls Rs)

Rate: 48.000

Quality: Best

Sample size: 24

Little Endian

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4. Click OK to close all the windows.

 

75. Now in the bin, select the sequence, right-dick and choose OUTPUT> EXPORT TO FILE .8

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6. Choose the Export setting you just created and a destination (the desktop for example).9

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7. Perform the export.

You have now created a surround movie as a Quick Time format. If you play it, you will see (or perhaps hear) surround, but how do you know it is a surround movie? Well the answer is to re-import it.

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Here are the different settingsImage Removed
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TO RE-IMPORT

Link to the file you just exported.

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Right click on that linked file in the bin and choose Modify > Modify Clip...Image Added
Choose Set Multichannel Audio from the drop downImage Added
Choose 5.1 SMPTE: L R C Lfe Ls RsImage Added
Click OK and edit back into a duplicate timeline to check.

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