Sometimes called pseudo or quasi-parametric EQ, a semi-paramteric EQ is a parametric equalizer that has one or more features missing. This term is sometimes used to describe a single band of equalization, where it generally means a parametric EQ that does not have a Q control (the Q is fixed). The term is also used to describe entire equalizer sections, which may contain several bands of EQ. In those cases it generally means one or more of the bands in question is not a full featured parametric; again it is usually the Q control that is missing. For example, a mixing board with a semi-parametric EQ may have a four-band equalizer on each channel, but only two of those four may be fully parametric (implying the other two do not have the Q control).