LFE for headphone

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LFE for headphone Empty LFE for headphone

Post by fullsun Tue May 27, 2014 7:30 pm

I have a good headphone connected to integrated sound card and after some test, the LFE is not present.
I have test with LAV&ffdshow and AC3filter.
Well, AC3filter always output in 2.0 when I put "same input", and "4.0" output also!!!
With ffdshow (same LAV), I have a good spatial but no LFE without mixer and "same input", on Dolby Prologic II without GRV it's good for me but this choice is not present in LAV audio.
It's strange than I haven't LFE in "same input" with "headphone virtualization".

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LFE for headphone Empty Re: LFE for headphone

Post by Admin Thu May 29, 2014 1:53 am

The output of the decoders is processed by the sound driver. So the audio settings in the Windows Control Panel also matter.

With a 2.0 source it is of course normal that the LFE channel is empty. Only 5.1 (and above) sources have a LFE channel.

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LFE for headphone Empty Re: LFE for headphone

Post by fullsun Thu May 29, 2014 8:52 am

arf, sorry, I use a audio test file with a 5.1 who tests each channel, and I have not LFE.
My problem isn't 2.0 to 5.1 but 5.1 to headphone.

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LFE for headphone Empty Re: LFE for headphone

Post by Admin Thu May 29, 2014 2:42 pm

You need to adjust the sound settings in the Windows Control Panel. Your sound driver also performs mixing.

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LFE for headphone Empty Re: LFE for headphone

Post by fullsun Fri May 30, 2014 11:20 pm

Well, I've check my sound card and no support it, I haven't the remix for Bass from a audio 5.1 to my headphone by default. Are you a idea? (Realtek ALC887 MB ASUS)
Also, I have test LAV audio with Stereo Dolby PrologicII and why LFE mix level is 0 by default? what value is better for headphone, 0.71?

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LFE for headphone Empty Re: LFE for headphone

Post by Admin Sat May 31, 2014 3:23 pm

If you want to include the LFE channel when down-mixing to stereo, then you need to set it to 1.58. It is 0 by default because the LFE is normally not supposed to be included for normal stereo speakers. The other surround channels also already contain low-frequency sounds.
A related technical document:
http://www.itu.int/rec/R-REC-BS.775-3-201208-I/en

I personally also usually set the center to 1.0 to get a bit louder voices.

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LFE for headphone Empty Re: LFE for headphone

Post by fullsun Sat May 31, 2014 4:32 pm

Thx, I have a good headphone, LFE works fine.

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LFE for headphone Empty Re: LFE for headphone

Post by fullsun Sun Jun 08, 2014 12:00 am

Thank you for this option in audio choice.  Smile cheers 

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