Instruction Manual
Internal Modulation (Speed and Depth)
Decay is also greatly inuenced by the SPEED (5a, 5c) and DEPTH (6a, 6b, 6c) settings since the Internal Modulation
has the potential to take energy away from the reverb process, which results in decreasing settle times. For example
setting Depth and Speed to about 4 o' Clock will smooth out resonances in the space and cause the reverb to settle
more quickly.
Using the Internal Modulation, SPEED (5a) and DEPTH (6a), is not like using external modulation such as LFOs and
Random Voltages from the modular system. The Internal Modulation is embedded in the reverb algorithm, and may
have a very dramatic eect on the sound of the reverb, adding and removing energy, diusing and detuning pitched
sounds. A small amount of Internal Modulation is useful for smoothing resonances and reigning in the Decay
parameter. A larger amount of Internal Modulation can create chorused, doppler, ambient and shimmered sounds.
When used with Innite Decay (DECAY set Full CW) Internal Modulation can create innitely evolving washes, ghost
choirs, bowed gongs and shifting feedback.
The modulation DEPTH (6a) controls both the amount and type of modulation: increasingly Cyclic to the left, and
increasingly Ergodic to the right. At the NOON the Internal Modulation is minimized. Cyclic modulation is a
multiphase cascaded chorus eect, which ranges from very subtle chorusing to extreme doppler swirls. Ergodic
modulation causes random room dimension shifting, which can become very granular at high depth. At the top of
the range on the Ergodic side there will be "Shimmering."
The user also has control over the SPEED (5a) of this modulation. At high Speed settings, Internal Modulation has the
eect of smoothing out the aural response of the whole algorithm and is useful for creating long but natural
sounding sustains. The slower range of the Erbe-Verb Speed parameter is atypical of reverb behavior in nature and is
not often found in reverb algorithms. At low Speed settings Internal Modulation is more discernible as a rhythmic
eect such as Chorusing, Evolving and Swirling. The speed may be synced to a multiple or division of an input clock
using the TEMPO IN (12a).
Note: with depth at noon (zero modulation), speed will have no discernable eect.
Absorb:
The ABSORB parameters (9a, 9b) will also have a great deal of inuence on the Decay. Absorb will aect both the
tone and the time of the Decay. Increasing the Absorb parameter value will decrease the Decay times and also have
the eect of making the reverb tail sound darker.
The ABSORB (9a, 9b) parameter is combination of controlling both Diusion and Damping within the space. Here's
how it works:
Full CCW = 0 diusion, 0 damping
10 o'clock = full diusion, 0 damping
Full CW = full diusion, full damping