$Page Channel EQ
$TargetName Channel EQ

*Making a standard channel equalizer*
This device is a simplified version of Live's standard Channel EQ device. It can be mimicked with four copies of [biquad~], each controlled by a [filtercoeff~], each of which is set to generate coefficients for a different filter type: highpass, lowshelf, peaknotch and highshelf.

ChannelEQ.png

-> Notice how inside every filter subpatcher, the parameters controlling it are passed through [line~], which slightly smooths the value change. This is done to prevent audio clicks. In the audio domain, a sudden change in time means a high frequency in the spectrum.
-> To evaluate the performance of a Max device, you can compare it to a similar native device. Set Live's Buffer Size to 64 samples and add 10 copies of the effect to a track, then watch Live's CPU meter. This is something to consider when making your own effects: if something can be done with a native device, it may not be necessary to replicate it in Max for Live.