RR 31 MComp De-Esser

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The Mcomp_de_esser.cmb patch implements the classic de-esser. The to devices output of the Combinator is split. One split into the normal Audio Input of the MComp and the second split through two MClass Equalizers into the Sidechain In of the MComp. We'll ignore the two Maximizers for now.

Rotaries 1 through 3 control both parametric equalizers on both MClass Equalizers in the same way. By combining 4 parametric equalizers we can apply a large enough enhancement to a frequency so it will trigger the compressor to work.

You can easily find the offending frequency by enabling Button1, it enables the Solo Sidechain button on the MComp. To protect your ears and hardware equipment it also enables Maximizer2.

Rotary4 and Button4 simply control Threshold and Soft Knee on the MComp.

Button2 enables both Lo Cut and Low Shelf on both equalizers, so the compressor won't work on loud low frequencies. With Button2 enabled the frequency of the dual Low Shelf is controlled by the Rotary1 as well.

One problem with a classic de-esser patch is the time it takes for the compressor to work. The attack of a compressor cannot be set to 0ms. So the first bit of the offending frequency would pass through unaltered. To compensate for this one needs to delay the normal input of the compressor for at least the minimum time of the Attack.

Unfortunately the two delays in Reason cannot cleanly delay a signal. Both slightly alter the sound, which in this case is undesirable. Fortunately the Maximizer in Reason can cleanly delay a signal by enabling its 4ms Look Ahead button. So in this patch Maximizer1 is not used to limit a signal but for its ability to cleanly delay a signal. Button3 enables this delay.

Of course you can use this de-esser not only on vocals but also on f.e. drumloops. By setting the Frequency to around 200Hz (Rotary1: 34) the snare sound will become much thinner. By setting the frequency to around 3kHz (Rotary1: 90) the snare sound will become much darker. Try it out for yourself.

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