Fixing noise issues in a small audio recording studio (https://classy.studio/pakistan) in Karachi involves a three-pronged approach. Firstly, you need to work on room acoustics and sound isolation. For that, choose the quietest room available, soundproof the space by sealing gaps, and add mass to increase the density of the walls, doors, and windows to block external noise. Use acoustic panels and install thick bass traps. Secondly, have good quality equipment, set your input levels carefully (aim for -12 dB to -6 dB), and manage electrical noise by using balanced audio cables and shielded power cords. Thirdly, ensure proper recording workflow and post-production.