Remove the hum of funds from audio recordings

Interventions aimed at the restoration of the audio signal requires great precision. For good results we can resort to special features available in noise removal software like "WaveLab", "SoundForge" and "Audacity."

The classic hum "HUM" (with a frequency of 50 Hz) is generated by the disturbance of the electricity network and we can delete it by using a combination of notch filters or, more simply, using plug-ins such as, for example, the excellent "Z-Noise "and" X-Hum "of the" WAVES ".

Alternatively, we can examine the buzz with a spectrum analyzer and reduced through an equalizer, the frequency of offending. If it is mild and is felt at the beginning of registration or only in quiet moments of the song, we try to suppress it with a noise gate careful to set the intervention threshold (Threshold) very low and the speed of opening and closing ( Attack) pretty sweet.