One of the most important tools for monitoring audio levels and quality during editing is a pair of headphones or speakers. You should use a high-quality and reliable set of headphones or speakers that can reproduce the full range of frequencies and dynamics of your audio. You should also avoid using earbuds, laptop speakers or other low-quality devices that can mislead you about your audio levels and quality. Another essential tool for monitoring audio levels and quality during editing is a meter. A meter is a visual representation of your audio signal that shows you the amplitude, peak, RMS, LUFS and other indicators of your audio levels. You should use a meter to check that your audio is not too loud or too quiet, that it does not clip or distort, and that it meets the standards and specifications of your platform or format. You should also use a meter to compare the levels of your different sound sources and make sure they are balanced and consistent. A third important tool for monitoring audio levels and quality during editing is your ears. You should listen carefully to your audio and pay attention to any issues or problems that you can hear, such as noise, distortion, clicks, pops, hiss, phase issues, panning errors and more. You should also listen to your audio in different environments and devices, such as headphones, speakers, car stereo, phone, etc., to check how it sounds in different contexts and scenarios.