Is there any difference between low-pass and high-cut filters? There must be, and that's why they're named differently. But, when and why would you use one instead of the other?
Low pass and high cut are synonyms, so there is no difference. Other filters also have multiple names. Here are some examples:
- high pass and low cut are the same.
- bell filters often have other names like boost/cut or peaking. When used in cut mode only, with a narrow bandwidth, a bell filter may be called a notch filter.
I normally hear it referred to as low-pass simply be cause it avoids confusion with high-pass filters, but low-cut and high-pass are exact synonyms. The only difference is if they are describing what is being cut or what is being taken.
I suppose there might have technically been a difference at one point based on if it was implemented by taking the lower frequencies out of a source signal or dampening the high frequencies to remove them from a signal, however the result of either description is the same, a signal where the frequencies above a certain frequency are removed or greatly attenuated.
A high-pass filter only allows a certain frequency range to pass through it. Frequencies below the cutoff are reduced by a factor of the Q of the filter, usually -12 or -24 db/octave.
Low-cut is a generic term that could apply to a high-pass filter, but more typically to a low-shelf filter.
A low-shelf filter reduces all frequencies below the shelf by a specified amount.