Program 13 ROOM B1
This room has constant diffusion density with time, and utilises a completely
different algorithm to ROOM A1. Maximum decay time is of the order of 700ms, and
because of the constant diffusion rate the impression of size of room is altered by
the DECAY control.
This program is very useful when very short decay times are required, and also for
drama dubbing where fine control is required over the perceived dimensions of
particular environments.
High frequency control is provided to simulate the amount of HF damping in the
room.
Program 14 HALL A1
This program has a similar history to ROOMA0. Used by some to great effect,
especially on vocals - it was replaced to allow greater smoothness in decay, but this
feature was liked by some.
Low frequency control of decay profile is not available on this program. Predelay to
300ms can be selected.
Program 15 PLATE B1
This is a program with high diffusion, similar to that produced by plate
reverberators. Percussive sounds are rapidly smoothed with this program.
Colouration is medium and decay even as with standard plate reverberators.
Decay times of up to five seconds are useful for normal use, and above for special
effects. Indicated decay times are accurate to about 5 seconds, but it should be
noted that perceived decay time will depend greatly on the frequency spectrum of
the input program material referred to the filter settings.
Predelay of up to 300 milliseconds is selectable.
Control of high and low frequency decay times is available.
Program 16 DELAY
This program gives very high quality delays of up to 810 milliseconds. The delay
required is set by selection of predelay. The decay time control then acts as a
feedback control, zero decay time giving a single repeat echo whilst above zero
regenerative echo effects may be obtained.
When used for this function the decay time control is not calibrated. Since the
feedback is achieved digitally, no degradation of the repeated sound occurs, and the
effect is quite remarkable for its clarity.
This delay appears on output 2 only. Output 1 is 'straight through' the
Analog-to-Digital-and-back-again chain. (For 2 channel operation; ECHO splits the
available delay time between the channels, with independent control over delay and
feedback).
Short delays may be used for automatic 'double tracking' or 'doubling' (up to about
40-50ms) longer delays to simulate tape echo, and very long delays coupled with a
high degree of feedback allow a musician to effectively 'play along' with himself by
laying a new bar on top of previous slowly decaying bars to build up a very full
sound.
Program 17 IMAGE P1
This program is the first of a series of IMAGE programs which are designed for very
special effect. IMAGE P1 is a program similar to the NONLIN series, except that the
reverberation produced pans between the stereo outputs as it proceeds. The length
of time of the effect is selectable by the decay controls between a few milliseconds
and about 0.6 seconds and can produce some very startling image effects which
RMX-16 Digital Reverberation System - 18 - Issue 1
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