User Manual

Tail Width

This parameter is present in all stereo reverbs and rooms. The reverb tail (all components of the

reverb except for early reﬂections, etc.) is passed through a simple 2x2 matrix. This provides an

encoding of the tail that dramatically changes its spatial characteristics. The tail can be changed

to feel narrower (even down to mono) or wider than normal stereo. There are values for the

parameter to encode the tail in such a way that it decodes into surround channels.

The parameter operates in the range of 0 to 360 degrees, with an incremental change of 1

degree. The matrix uses Sine/Cosine rules so that power distribution remains constant. This may

be acceptable—even highly desirable—but the mix engineer must fully understand the process

and its implications. It is possible to compromise the mono compatibility of a mix by using this

parameter carelessly.

This is a powerful tool for audio whose release format is two-channel. It is not useful in any other

format. Formats include compact disc and radio/television broadcast. Some of these effects

are clear and noticeable without any sort of decoder. Many are even more dramatic when a

decoder is in place, such as in a home theater.

It is strongly recommended that you monitor in all possible formats (stereo, mono, matrix

surround) when using this parameter.

Tap Slope

This is an unusual parameter which affects the relative gain of impulses coming from the reverb.

While this parameter does not (as it might appear) make the reverb sound ‘bumpy’, it may affect

timbre or the overall sense of spaciousness.

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NOTE: Though the term “impulse” is used in this manual, these algorithms are NOT

convolution reverbs!