The QUANTIZER takes four different CV inputs and processes them in a way that the CV values "snap" to the exact values so that oscillators controlled by the outputs of the module play the notes of a selected musical scale. With an encoder one of 16 scales can be selected and is displayed in a text display,

There are 4 independent channels that are quantized to the same selected scale.

https://wiki.aemodular.com/pmwiki.php/AeManual/QUANTIZER