Software
CORSAIR's peripherals are controlled through iCUE. After selecting the HS60 HAPTIC gaming headset, you'll see its photos from various sides, two sliders and an "Auto Audio Repositioning" toggle. The first slider adjusts the microphone volume, and the one next to it controls the volume of microphone sidetone, better known as microphone monitoring. Here, you'll determine the volume of the sounds picked up by the microphone in the headphones. If you're wondering why you'd want that in the first place, the explanation is simple enough—hearing yourself talk with no delay will prevent you from shouting or sounding nasal. I found it best with the microphone sidetone slider around the middle.
The Auto Audio Repositioning option is perhaps best explained by
this official post on the CORSAIR forum. I didn't find any use for it.
Finally, there's a 10-band system-wide equalizer, which lets us switch between various default sound profiles and create our own. You can use it to tailor the sound to your preference. Since the HS60 HAPTIC has a fairly colored sound signature, this is where you can change it, perhaps by reducing the lower frequencies, and adding middle frequencies.