Update on my visit to the workshop. The Maserati mechanics had a good look at the brake discs and brake pads, and what they did was they took away the metal plates that have on them an indicator for direction of inserting brake pads, as they said these plates also caused noise problems on Ferraris. The plates are pretty close to the brake discs and when hot the noise becomes more pronounced. They also told me that on the same day that I sent in my car for brake pad replacement, another Ghibli also did the same and came back with the same issue. I said to them: OK, let me give it a test drive. Now I have driven for many days and a few hundred kilometres and there is not even a single noise of the sort that I heard before and posted on YouTube in my previous post.