to isolate sound inside a room, you will want to pad the inside of the room, not the exterior. afterall, you are trying to contain sound INSIDE a given space to keep it from getting it out, right? popular wall treatments include auralex and whatever else is similar out there these days, however, these things are only secondary to the structure of the room and how it is designed. Considering sa Pinas 'to, the walls are prolly made of hollow blocks or something. Try and line the walls with heavy cloth curtains, maybe install wooden walls that are set apart from the concrete wall structure by a gap filled with insulation. The space will help decouple the noise, vibration and temp from the outside of the house. Now, if you have quite a bit of recording gear and tube amps on the INSIDE, it is going to be hot as hell so you had best invest in some kind of exhaust fan otherwise you are going to fry in your room.
My control space is lined with heavy wool curtains that work well with my gobos.
