ENSONIQ DP/2 Specifications download pdf (Page 77)

Section 2 — Algorithms

ENSONIQ DP/4+ Reference Manual 61

LARGE ROOM REV

Large Room Rev, larger than Small Room Rev, provides ambience.

Large Room Rev Signal Routing

Diffuser

Main

Outputs

Left

LPF

Definition

(Decay Diffuser)

Echo TimeEcho Time

Diffuser

Right

LPF

Definition

(Decay Diffuser)

Echo TimeEcho Time

The signal enters a low pass filter, and goes directly through the diffusers which smear the signal.

The signal is then routed to a larger decay diffuser, known as Definition, and is diffused over a

period of time (creating a decay). There are taps from both the left and right Definition that are

routed to the output to create a synthesized stereo output. A signal from the Definition goes

through a low pass filter followed by a low frequency decay parameter, which controls the rate of

decay of the low frequencies. There is also a parameter at this stage that controls the decay time

of both the left and right signals. The left and right signals are routed back into the Definition.

There are two echo times between the diffuser and the definition that can be routed directly to

the output, or sent back through the definition. There is also an external dry signal (not shown)

that goes directly from the input to the output and is controlled with the Mix parameter (01).

01 — Mix

02 — Volume

These parameters are explained in detail under the Mix and Volume Parameters description,

found in the beginning of this section. Reverbs sound best with a Mix of wet and dry.

03 — Decay Range: 0.20 to 150.0 sec.

Controls the amount of time it takes for the reverberation to decay away to a very low level after

the input signal stops. In room reverbs, we don’t recommend higher settings, which tend to

create an infinite and unnatural sustain. Since most ambient room reverbs don’t naturally have a

large decay, set this low for the best sound.

04 — Predelay Time Range: 0 to 450 ms

Controls the amount of time it takes for the original signal to be presented to the reverb. Higher

values denote a longer delay.

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ENSONIQ DP/2 Specifications Page 77