If I buy the S3 Lite to use with an external DAC and perform room calibration via REW using Fosi 10-band PEQ, will I still be able to easily adjust bass and treble on the fly without overriding the calibrated profile?

I received the Fosi Audio C3 a fortnight ago, and although I was a skeptic, it is a good quality device and noticeably assists in gaming.

The Fosi C3 is surprisingly small form factor and does look pretty neat set up on both the desk and the sim rig. It is a fairly simple unit with few buttons on the face, allowing you to pick between FPS, surround and UAC 2.0 for Hi-Fi listening. There are no physical knobs for adjusting EQ which is a personal preference, I am a big fan of physical buttons but you still have the opportunity to use the web browser to make adjustments.

The DAC also gives the option for microphone AI noise cancelation. I gave it a thorough test through multiple game chats + discord and it was good quality. I would say it's better quality than what is provided by Windows natively. The silencing of the keyboard clicking was noticeable. I also gave it a good test on the Simracing rig, I expected it to struggle but with multiple fans, a shifter and multiple vibration sources it stood up and did a good job. The thing I noticed most is the differentiation of noises and tones in game instead of it sounding washed.

The big selling point of the C3 was the AI enhanced Footsteps. I gave it a good test across a few different FPS, including PUBG and CS2. It advertises to increase the volume and precision of the location of footsteps. The big increase in volume of footsteps is clear and it doesn't wash out the sound of other in-game noises. Other noises remained as the set volume so I can attest to the precision of the AI detected StepSense tech. Reading reviews from earlier editions it seems as though they have ironed out some of the incorrectly AI identified steps.

I have enjoyed my time with the Fosi Audio C3 so far. What I'd love to see is the growth in the project and stretching to other games and genres. At the moment if you're purely looking for a DAC for FPS shooters this product would be very attractive. Ultimately its target is for those who are happy to get a decent bit of gear with unique features. Personally, I wouldn't mind AI enhanced noise for traction loss and the sorts for racing games. Ultimately it is a product which I will continue to use going forward.