Surround sound 5.1 from wrong speaker

[ghaghamashibaba]

I have my iMac 27" (Mid 2011) connected to a Sony AV Receiver. When I do a sound check the sound that should be coming from the center speaker is coming from the rear left speaker. Does anyone know a solution for this problem?

- The speakers are connected correctly, i tested with my xbox while playing a DVD
- The applications i have tried are VLC, Mplayer, plex
- Quicktime Pro 7 is playing from the correct channels

[Madd the Sane]

Wirelessly posted (Mozilla/5.0 (iPod; U; CPU iPhone OS 4_2_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5)

Try using Audio MIDI Setup app from the Utilities folder.

[ghaghamashibaba]

First thing I did and when I play the test sound its is ok

[Mulchfud]

I had the exact same problem; center sound through rear left speaker. On gaghamashiba's advice (thank you) I opened Audio Midi setup. In the HDMI folder, I found that the speaker setup was set to 7.1. After changing it to 5.1, everything seems to be okay.

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On Madd the Sane's advice, I mean...

[ghaghamashibaba]

I had the exact same problem; center sound through rear left speaker. On gaghamashiba's advice (thank you) I opened Audio Midi setup. In the HDMI folder, I found that the speaker setup was set to 7.1. After changing it to 5.1, everything seems to be okay.

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On Madd the Sane's advice, I mean...

Mine is set to 5.1 but I still have the problem, what are your other settings?