Filters
Audio filters help eliminate unwanted interference or noise from an audio recording. The result is to improve the tone and playback of human speech, music, nature, and environmental recordings.
The audio filter changes frequency by increasing, boosting, or amplifying a range of frequencies. A filter could also decrease, delete, cut, attenuate, or pass a frequency range. For example, using a low-pass filter, you could remove the traffic noise from a recording of two people talking in a city.
In particular, we will cover the following filters:
- Low-pass filter
- High-pass filter
- Band-pass filter
- Low-shelf filter
- High-shelf filter
- Band-stop filter
- Peak filter
Let’s start with the low pass filter.
Low-pass filter
The low-pass filter cuts or deletes low-frequency sounds, such as traffic noise, machine engine rumbles, or elephant calls.
Typically, the minimum cut-off frequency is 150 Hz, the maximum cut-off is 7.5 kHz, the...