How to Clean Up Sound Effects by Removing Low-end Noise
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.
There are certainly many software plugins that remove noise and some work quite well. However these softwares often require a bit of study, which may impossible during a tight deadline. Instead, simply use the basic equalization and reverb plugins provided in your video or audio editing software.
Use standard package plugins and the following tips to eradicate nasty noise from the bottom end of your audio recordings:
Initially you can try using a Single Band EQ to attempt to erase much, if not all, of the unwanted hum. Using such an EQ you can take away all the audio below or above a certain frequency. For instance, since a low end rumble from an air conditioner emits around 60 Hz then by placing a Single Band EQ at 80 Hz one can most likely eradicate most of the unwanted noise without damaging any voice tracks.
Next, target a very small width of the offending sound spectrum by using a Parametric EQ and "notching," which decreases a certain frequency and its octaves such as 80 Hz, 160 Hz, and 320 Hz. One preserves the surrounding audio by being able to target a small area of audio.
Third, use a Parametric EQ to boost the desired audio slightly. By doing so, it will be prominent over the noise and take the listeners attention away from the unwanted hum. For example, boost a bit at 5 Khz to raise the human voice over a low hum.
Finally, one can use reverb on the entire mix once the lower rumble has been cut out. This can reduce the "tin can" effect that might result from minimizing the lower end.
By using the above tips, while they will not completely fix poorly recorded audio, one can vastly help the quality of a recording in which a undesirable low end frequency is compromising the other elements in an audio mix.
There are certainly many software plugins that remove noise and some work quite well. However these softwares often require a bit of study, which may impossible during a tight deadline. Instead, simply use the basic equalization and reverb plugins provided in your video or audio editing software.
Use standard package plugins and the following tips to eradicate nasty noise from the bottom end of your audio recordings:
Initially you can try using a Single Band EQ to attempt to erase much, if not all, of the unwanted hum. Using such an EQ you can take away all the audio below or above a certain frequency. For instance, since a low end rumble from an air conditioner emits around 60 Hz then by placing a Single Band EQ at 80 Hz one can most likely eradicate most of the unwanted noise without damaging any voice tracks.
Next, target a very small width of the offending sound spectrum by using a Parametric EQ and "notching," which decreases a certain frequency and its octaves such as 80 Hz, 160 Hz, and 320 Hz. One preserves the surrounding audio by being able to target a small area of audio.
Third, use a Parametric EQ to boost the desired audio slightly. By doing so, it will be prominent over the noise and take the listeners attention away from the unwanted hum. For example, boost a bit at 5 Khz to raise the human voice over a low hum.
Finally, one can use reverb on the entire mix once the lower rumble has been cut out. This can reduce the "tin can" effect that might result from minimizing the lower end.
By using the above tips, while they will not completely fix poorly recorded audio, one can vastly help the quality of a recording in which a undesirable low end frequency is compromising the other elements in an audio mix.
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Visit SFXsource's sound effect catalog and hear excellent sound effects and production tracks at Sound Effects Library and download free sound effects and music loops at Free Sound Effects and Loops
posted by Marcondes Allen at 9:27 PM
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