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Force ffdshow audio (or LAV audio) in browser

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Force ffdshow audio (or LAV audio) in browser Empty Force ffdshow audio (or LAV audio) in browser

Post by ptepic on Mon Oct 26, 2015 5:07 pm

How can I use ffdshow audio (or LAV audio) for output sound from browser (if it is possible)? I need to downmix the sound that comes from my browser (I use Opera)...

Thank you very much!

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Post by Admin on Tue Oct 27, 2015 1:43 pm

That is not possible because it does not use DirectShow codecs.

You can downmix audio by configuring your speakers in the Windows control panel. But that will of course apply to all programs.

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Post by Sepidoel on Tue Feb 11, 2020 8:13 pm

I tried not to create a new thread, so I dug up an old one.
ptepic wrote:How can I use ffdshow audio (or LAV audio) for output sound from browser (if it is possible)? I need to downmix the sound that comes from my browser (I use Opera)...

Thank you very much!
It's already a few years since this thread created, is there any update solution?

Actually I'd like to have FFDShow Audio Processor or AC3Filter for all the sound that goes to the speakers, especially the Delay and Mixer Matrix. Is there any software, paid or free, that can do that?

Thank you in advance.

Sepidoel

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Post by Admin on Thu Feb 13, 2020 4:19 pm

It is not possible to use these filters.

Why do you need delay? If you are outputting to a receiver, then you should check if your receiver has delay setting.

How do you want to mix the channels?

A virtual audio device might be what you are looking for:
https://sourceforge.net/projects/hesuvi/
https://sourceforge.net/projects/equalizerapo/

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Post by Sepidoel on Fri Feb 14, 2020 7:52 pm

Dear Admin,


I have a friend who does professional audio installation, while I'm a totally amateur on this subject. On one of his project, an audio system installation in a 20x70 metres hall, I learned from him about "balanced-unbalanced" signal and delaying far-placed speakers, and those things were controlled from an audio processor unit (which in his case was separated from the amplifiers). When I saw he used a computer as the source (with Resolume software) I started to think that with most modern desktop PC had 8 channels sound plus the FFDShow Audio Processor and AC3Filter can do most of that unit capabilities then in many cases we could simplify the system easily. If higher sound quality needed just plug a better sound card and it still is a cheaper and more practical solution.

I have been wanting the FFDShow Audio Processor or AC3Filter be available to all PC softwares for quite some time, but this professional case I just knew really makes me think that this should be a really good solution.


Now onto the "balanced-unbalanced" signal topic. I learned that unbalanced signals from PC was not good to be used in long cable, and he also told me about the reverse polarity theory in the balanced signal for the solution. I was fascinated by that simple yet ingenious solution. And after some time I got an idea, with the mixer's matrix in FFDShow Audio Processor or AC3Filter we can generate the reverse signal in the PC, albeit sacrificing half the total channels in the PC. For example the Front Left source channel is outputed to both FL speaker channel and FR speaker channel, but the FR speaker channel signal is reversed (-1). Yesterday I just made the cable (3.5mm to XLR) and plugged the 3.5mm end to a PC and the XLR to an active speaker; it worked flawlessly on first try.

Playback using MPC-HC (K-Lite 15.3.8 ) is perfect, the big problem is how to force every PC software to use FFDShow Audio Processor or AC3Filter.


I know this is just a crazy hobby of mine, but it's very intriguing that I wrote a long story to find an answer (sorry for that). Please let me know if there's a way to force software to use the audio processor.



Anyway, I have used K-Lite for more than a decade. Everytime I tried another media player I always went back to K-Lite. Thank you very much for the awesome work.

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Post by Admin on Fri Feb 14, 2020 9:10 pm

The electrical signal can travel 70 meters in less than a microsecond. So no need for any delay Wink

You can use GraphStudioNext from K-Lite in combination with a virtual audio device:
https://www.reaper-x.com/2011/04/25/how-to-realtime-ac3-or-dolby-digital-encoding-for-games/

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Post by Sepidoel on Sat Feb 15, 2020 6:07 am

Much appreciated, kind Admin.
I'll try it on Sunday.
Thank you very much.

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