Doc Mel,
Ano yang wall mo fabric lang ba yon or me palaman na accoustic material?
Thanks
What I placed was just 10mm insulators in the walls to help prevent the sound from going out of the room. Initially, I thought that the insulator had acoustic properties but it has none. I then covered the insulators with fabric.
i still had to get rockwool panels and bass traps to help in the room treatment.