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Windows 7: VIA HD Audio 2.1 or subwoofer cutoff frequency

05 Dec 2014   #1

Windows 7 Ultimate 64 bit
VIA HD Audio 2.1 or subwoofer cutoff frequency


I have an issue with my VIA HD audio. I only need to listen stereo music in 2.1 channels.
My datas:

Package version:
Codec Version: VT2021
Driver Version:

I only be able to set 2 channels, 4 channels, 6 channels (obviously 5.1), and 8 channels.

I built an amplifier with 5 channel, and have an active subwoofer. But if i set my driver to 6 channel, sadly only stereo sound came out. But when i set to "Speaker fill", then like every channel play the same, so my sub doesn't have a lowpass filter built in. And also my rear speakers are playing in speaker fill. I only like to hear the music what i play in stereo with subwoofer on. But i don't know how could i possibly manage that.
Thank you for the help!
My System SpecsSystem Spec
05 Dec 2014   #2

Windows 10 64 bit

A 2.1 speaker system is only a "Stereo" system and the "Stereo Speakers" is set as the speaker type.

For a 5.1 system, you set the speaker type as 5.1. There are 3 connections to the PC sound and the 5.1.

However some sound, even with a 5.1 system is only stereo.
My System SpecsSystem Spec
05 Dec 2014   #3

Windows 7 Ultimate 64 bit

Firstly, thank you very much for your reply!

I am sorry, maybe i wrote something wrong. I know that there is different type of "stereo" systems.
My point is that i don't have a 2.1 speaker system, like many pc speakers, which are contains built in 3 channel amplifiers, and also in that contains a low-pass filter before the sub-amplifier, so in that was the simple stereo 2 channel can also works as 3 channel, 2 front, and one to the sub.
But i wanted to manage that maybe with software, to take a simple 2 channel (stereo), and split with a low-pass filter, and a high-pass filter to separate the sub frequencies, and the above of 70 Hz for example.

Because i don't have a low-pass filter in my subwoofer, to cut the middle frequency and above. I know also that if i switch to 5.1 in VIA HD audio, then it remains stereo, and only 6 channel sounds will playing all the channels, like DTS movies, and etc...
My System SpecsSystem Spec

06 Dec 2014   #4

Windows 10 64 bit

The PC sound system is setup for specific "computer" sound systems. If you are using a non-computer sound system then its up to that sound system to be able to separate the sound. The PC can't do that. Is this the question?
My System SpecsSystem Spec
06 Dec 2014   #5

Windows 7 Ultimate 64 bit

Well, i built a 5 channel amplifier, and i have an active subwoofer without low-pass filter. This is not a typical "computer" sound system, but not that different! I have also an external USB Creative SB sound card, which downmix and cut off the subwoofer frequency from all the 5 channels, even if it's only just stereo, also it has a crossover frequency slider, but it is now broken physically. So i had to use the Motherboard's integrated VIA 7.1 HD soundchipset, and the VIA Envy HD audio Deck is unable to reproduce the same thing. I thought there are some plugin, or codec, or some little software which can get a sample from all satellite line output, and downmix the low frequencies. But as i see in your answer, there is no solution for this problem.
My System SpecsSystem Spec

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