jmanthefonz :
Hey Mr Olinad, I have the same issue, but no separate sound card. My MSI MPower Max MOBO has a 7.1 onboard sound processor, how would I go about doing this through Realtek HD Audio Manager? If I turn on 7.1 i lose 90% bass like the poster :/
Even when you set to 7.1, if your front channels are defined as Full Range speaker you will not notice the subwoofer.
Try as follows on Windows 7:
- use your Realtek HD Audio Manager and set to 7.1 channels
- right click on the taskbar's speaker icon and go to Playback Devices
- select your speaker and click on the Configure button
- are your channels set to 7.1 surround as you set on the first step? if not, change it now. click next button
- select all the Optional Speakers. click next button
- now you must uncheck both Front and Surround speakers. click next button
- click finish button
- still on the Playback tab, with your playback device selected, click on the Properties button
- go to Advanced tab
- select the highest sample rate and bit depth possible
- select both checkboxes you have on Exclusive Mode (Allow applications... and Give exclusive...) and click OK
- click OK
The main objective here was to define that you have a subwoofer, because Tiamat really has, and the only way to do this is setting all your speakers as High range only so the Lows will be directed only for your .1 channel (subwoofer).
After that, try to look if you have some kind of LFE config on your Realtek HD Audio so you can try to define a crossover as I did. The crossover will let you define the maximum frequency you will direct to your subwoofer. I recommend something from 70 to 80.
If you don't have any crossover functionality on your device, the only way to adjust your subwoofer will be through the Tiamat main control and unfortunately the only possible control is over the volume.
I hope this helps.