Wow, I have a semi-old Sennheiser PC 320 G4ME (with a cable) and the hw mute has never let me down, also I'm pretty sure it's actually in HW, so how would the s

Wow, I have a semi-old Sennheiser PC 320 G4ME (with a cable) and the hw mute has never let me down, also I'm pretty sure it's actually in HW, so how would the software fail?