Creating Audio Track with Phase Difference

[Dave1024]

Hi,

I would like to create an audio stream in which tracks are in out of phase. Which tool is useful for achieve the same ? Does ffmpeg help me to create an audio stream which satisfy my needs?

Thanks
Dave

[raffriff42]

ffmpeg filter command to reverse phase of right audio channel: -af "channelsplit=channel_layout=stereo[L][R];[R] biquad=-1:0:0:1:0:0[Rinv];[L][Rinv]amerge"

BTW I couldn't find an existing ffmpeg biquad filter example on the Internet, so this may be the first.
It's a very trivial, of course. Good thing for me. References:
http://ffmpeg.org/ffmpeg-all.html#Filtering-Introduction
https://en.wikipedia.org/wiki/Digital_biquad_filter

If you are using Avisynth it is easier:
call GetLeftChannel & GetRightChannel;
call Amplify(-1.0) on one of the channels;
call MergeChannels

[pattihubbard]

Thanks for the help raffriff!!

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