Multiband processing is the process of splitting the incoming audio signal into frequency 'bands'.  For example, a bass band, a mid-range band and a high band.  Once the signal has been split into individual bands, some form of processing (such as equalization or compression) is applied to each band.  The advantage of this approach is that the effect can be maximized across the full frequency spectrum of the input material.  For example, in the case of compression, compressing an entire mix may result in 'pumping' where a loud kick drum could cause compression of the entire mix.  But with multiband compression, this effect is minimized, because the level of mid-range and high frequency instruments are not dragged up and down with the higher volume low band signals.

Although the DADEV Multicomp is no longer available, it's graphical layout provides a perfect example of the concept of multiband operation. 

  • The Threshold, Ratio, Attack and Release of the three frequency bands layered one on top of the other, with 'Low' at the bottom and 'Hi' at the top. 

  • Each band has an analog style meter showing the output level or gain reduction. 

  • The cutoff frequencies of the three bands are controlled by the 'Low Pass' and 'Hi Pass' knobs.

  • As with many multiband processors, it is possible to solo or mute individual bands, so that the parameters of each band can be tuned individually.

  • There is a final 'Limiter' control to contain the overall level of the output signal if required.




Dante August 2011