What is the difference between a shelf eq and a filter eq.

A shelf EQ is a type of EQ that allows the mixer to boost or cut the level of a specific frequency range across a broad spectrum. This type of EQ is characterized by a gentle slope, with the level of the frequency range being boosted or cut gradually over a wide range of frequencies.

For example, a high shelf EQ might allow the mixer to boost the level of all frequencies above a certain point, such as 10kHz. This can be used to add brightness and sparkle to a signal, or to make it stand out more within the mix. On the other hand, a low shelf EQ might allow the mixer to cut the level of all frequencies below a certain point, such as 100Hz. This can be used to reduce the boomy or muddy quality of a signal, or to make it sit more comfortably within the mix.

A filter EQ, on the other hand, is a type of EQ that allows the mixer to boost or cut the level of a specific frequency range within a narrow band. This type of EQ is characterized by a steep slope, with the level of the frequency range being boosted or cut rapidly over a narrow range of frequencies.

For example, a high-pass filter EQ might allow the mixer to cut the level of all frequencies below a certain point, such as 100Hz. This can be used to reduce the low-frequency content of a signal, or to make it less dominant within the mix. On the other hand, a low-pass filter EQ might allow the mixer to cut the level of all frequencies above a certain point, such as 10kHz. This can be used to reduce the high-frequency content of a signal, or to make it less strident or harsh.