How To Make Your Own Video

How to Remove Low-end Noise from Sound Effects for Video

Since commercial and corporate video production budgets can often be small and executed under a short time frame, the recorded sound may suffer. During post-production, as a result, producers may encounter some terrible audio problems. One common dilemma is a low-end noise or hum that permeates dialog and other ambiance recordings.

Software plugins that remove noise from audio abound and some function very well. However, under a fast approaching deadline, one may not have the time to find, purchase, and learn the nuances of a new plugin. For these situations, simply turn to the default equalization and reverbs provided in your audio or video editing software.

Use these procedures in tandem with your default plugins to help rid your audio recording of unnecessary and distracting noise:

First, use a Single Band EQ to try and cut out the offensive hum. This type of EQ will cut out all sound below or above a certain frequency. For example, since low rumbles generally occur around 60 Hz, you can use a Single Band EQ to cut out everything below 80 Hz which will remove the hum without adversely affecting the dialog.

Second, use a Parametric EQ to "notch" targeted areas by using a very small width of the sound spectrum to decrease a specific tone and its octaves, such as 60 Hz, 120 Hz, and 240 Hz. By targeting only small areas of sound one hopes to rid the offensive noise while preserving the surrounding frequencies.

Secondly, you can boost the desired audio also by using a Parametric EQ. This will give the wanted audio prominence over the unwanted audio. Once can boost the dialog at 5 hz slightly, for example, to give it prominence over a low rumble.

Fourth, after cutting out the lower end, a bit of reverb can be used on the mix. Such an effect can wash over and warm up a "tin can" feel that might come from taking out the bottom end.

While the above tips are very basic and will not by any means eliminate the problems of poorly recorded audio, they will definitely improve the sound of a poor recording when the dialog and hum are vying for the listener's ear.

Click Here For Detailed Information

Check out SFXsource's sound effect library and hear great sound effects and production samples at Sound Effects Library and download free sound effects and music loops at Free Sound Effects and Loops