To: laurentk
Hello,
We advise you to use AVS Video Editor:
http://download.avs4you.net/distributives/AVSVideoEditor.exe
Unfortunately, the software is not able to keep 6 channel sound.But you can have video with 5.1 sound.The multichannel sound can be set for files that are being converted to .wmv, .mp4, .avi, .mov and .flv formats.
Click Advanced, in the Audio Codec section choose PCM or MPEG 2/4 audio codecs and in the Channels drop-down box select 3/2+LFE 5.1 Surround if available.
Best regards.