Setting Up Your F999 Soundcard on the Surface Laptop
Settings → System → Sound → "More sound settings," then right-click the F999 and set it as both the Default Device and Default Communication Device. That way it handles both your music and your calls.
Open the F999's own control panel and pull up the EQ. You want to give the 60–80Hz range a gentle nudge up — about +3 to +4dB feels right for warm, solid bass. Then pull the 200–300Hz area down just a touch, because that's the "boxy" zone that makes bass sound muddy instead of clean. Small adjustments go a long way here, so don't overdo it.
In Windows Sound settings, right-click your F999, go to Properties, then the Enhancements tab. Turn on Bass Boost and Loudness Equalization. If you spot a Virtual Surround or stereo widening option in there, switch that on too — it opens the sound up nicely.
Go to the Advanced tab and uncheck "Allow applications to take exclusive control." This stops apps like browsers or video players from hijacking your carefully set audio settings every time you open them.
Finally, keep your Windows volume around 85% and let the F999 do the heavy lifting with its own gain. Pushing Windows to 100% while boosting bass is a recipe for distortion.
For VCAL Calls:
In the F999 software, find the Noise Suppression setting and drop it to Low. When it's set too high it strips out the low-end warmth and your voice ends up sounding thin.
Oppo A3 Pro:
Go to Settings → Sound → Audio Effects and turn on the EQ. Boost anywhere between 60–100Hz to add that bass body you're after. Also flip on Stereo Enhancement while you're in there — the Oppo saves both settings automatically, so you won't have to redo it after a restart.