[MPlayer-users] AAC 5.1 and -af pan= (5.1ch->2ch)

Reimar Döffinger Reimar.Doeffinger at stud.uni-karlsruhe.de
Sat Feb 19 16:02:19 CET 2005

On Fri, Feb 18, 2005 at 01:19:31AM -0800, Loren Merritt wrote:
> I use -af pan=6:.32:.39:.06:.17:-.17:.33:.32:.06:.39:-.17:.17:.33
> I got the coefficients from MatrixMixer. I can't vouch for any theoretical 
> basis, but they sound fine to me.

I updated the manpage example with these values...

> (You can see that my matrix is not normalized; I had to scale down the 
> coefficients to avoid clipping.)

Well, I don't know when you would call a (esp. non-square) matrix
normalized... But to avoid clipping in every case you would have to divide all those values by 1.44

And also, (esp.?) if you use headphones, the new hrtf filter should give much
better results (but needs a lot of CPU).

Reimar Döffinger

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