Manual

Reverb Frequency Multipliers
The display near the center of Eos’s window that looks like a frequency-response graph controls several
things. The shaded portions reflect filters that change the frequency response of the reverberators and hence
the tonal quality of the reverb tail. The LOW MULT (short for multiplier) setting determines whether low
frequencies are boosted or attenuated. This control has a range of 0.5 to two. If its value is less than one, low
frequencies decay more rapidly within the reverberator, relative to mid-range and high frequencies. If its
value is greater than one, low frequencies decay more slowly relative to other frequencies. If you’re looking
for that low-end “bloom” popular in reverb sounds from the 1980s, crank up the LOW MULT. You can change
the LOW MULT setting in either of two ways: either click and drag vertically in the left side of the frequency-
response graph, or click and drag directly on the LOW MULT value itself.
The HI MULT (short for high multiplier) works in a similar manner, but
operates on high frequencies and only provides settings for
attenuation—that is, making high frequencies decay more rapidly than
the rest of the reverb tail. It has a range of 0.5 to one. Change the HI
MULT value either by clicking and dragging up and down in the right
half of the frequency-response graph, or by clicking and dragging up
and down on the HI MULT value.
If you’re particularly technically inclined you might be wondering
about the corner frequencies of the low- and high-frequency multiplier
filters. Since those frequencies are rarely something that needs to be changed, we’ve tucked them away in a
couple of hidden parameters. They’re not visible in Eos’s window, but you can find them by looking at either
the generic editing controls that your host provides for plug-ins, or at the list of automatable parameters
displayed by your host. Eos comes with a number of presets with the multiplier filters carefully tuned so in
most cases you’ll be able to start with one of these presets and adjust it to your liking without changing those
frequencies. If you really want to tweak those parameters, you know where to find them.
Input Filters
Eos employs a pair of simple filters at the inputs of the reverberators to
control the overall tonal character of the reverb. The low-cut filter
reduces the low frequencies (“bass”) and the high-cut filter reduces the high frequencies (“treble”).
The settings of the low- and high-cut filters are reflected by the curved lines in the frequency-response graph.
Changing the LOW CUT control changes the frequency at which low signals are reduced; changing the HI CUT
control changes the frequency at which high signals are reduced. The LOW CUT control has a range of 20-