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There are many reasons why you may want to add a low/high pass filter to your audio recording but you might not know why it's necessary. When recording sound, you don't need to record or include in your finished audio any sound except for the frequencies you wanted to record. This can help ensure your audio is as high a quality as possible. Everything from air conditioner noise to malfunctioning camera fans can affect your sound in an undesirable way which is why roll-off is such a good thing. In this video I'll explain high/low pass filters and why you would use them.
To learn about Overtones, Harmonics and the Human Voice:
https://youtu.be/qBpAU-j_FWg
To watch my video: All About SPL
https://youtu.be/tiBmKhxsvAc
3 band roll-off image can be found at:
https://www.sweetwater.com/insync/what-is-a-highpass-filter-when-should-i-use-it
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