I just spoke to Airtel nodal officer about the audio issues on Gemini HD. They have arranged for a call back and I got a call from technical team. They said they are aware of the issue. And broadcaster is working continuously to fix it. They can't commit a deadline since it's a broadcaster issue.
Can you guys also please call your respective nodal officer and raise it.
FYI, Airtel nodal officer number - 04040024449