Manual

223 PRO X User Manual
Appendix D: KLARK TEKNIK DN780 Reverb
This appendix contains parameter application notes for the DN780 reverb internal eect on the PRO X. This is followed by information on the special eects program
and technical specications of the PRO X Control Centre’s DN780.
Parameter application notes
This section provides application notes on the parameters of the DN780 Reverb eect.
Pre-delay
0 to 990 milliseconds (ms) of pre-delay is available allowing a very wide range of control. Delays of less than 30ms closely integrate the direct and reverberant sounds;
often a desirable feature on percussive sounds. Delays of 50ms or more cause the direct and reverberant sounds to separate and convey a feeling of depth and distance
to the simulated environment. Delays above 2300ms are used for creating special eects.
Pattern
The pattern control alters the ‘density’ of the early reections. It is adjustable from 0 to 9 as shown on display f1, with 0 giving a low density or ‘grainy’ character to the
early reections and 9 producing a high density eect.
Level
The level control functions convincingly as a ‘depth’ control, altering the apparent distance between the sound source and the listener. It is adjustable from 0 to 9 as
shown on display f2, with 0 being relatively distant and 9 bringing the sound source closer.
Decay
The reverberation decay time is adjustable from 0.1 to 18 seconds, depending on room size, changing the reverberant eld from a virtually dead sound to a totally
surreal eect. Short decay times, under one second, are essential for authentic small room simulation and also extremely useful for ambience applications where
classic reverberation is not wanted. Reverb times of 1 to 4 seconds cover the majority of normal applications where classic reverberation is required. Longer decay
times are available for special eect applications.
LF key
LF is adjustable to ±7, depending on room size and decay time, as shown on display f3. An increase in LF decay time is generally desirable on simulations of large halls,
since low frequency sounds suer less than higher frequencies from absorption in air. Very small spaces usually need the ‘thin’ sound created by reducing LF decay.
HF key
HF is adjustable to ±7, as shown on display f4. The HF decay control sets the absorption characteristic of the simulated space. In reality, large environments feature
considerably reduced high frequency decay times due to air absorption. A smaller room will feature greater HF decay time if the walls are tiled and the room is empty
than if the room contains soft furnishings and curtains. The wide range of control provided will allow a suitable setting to be chosen to enhance realism in most
applications.
Room size
Room size is adjustable from 8 to 90 linear metres, representing a wide range of volumes. Since the acoustic character of a given environment depends not only on the
reverberation time and construction of the room, but also to a great extent on its volume. The room size control is, in fact, essential if authentic simulation of a range
of dierent sized environments is required. Small room sizes give a conned, ‘box-like’ sound. Medium room sizes suggest a room or small hall, whereas large room
sizes suggest a large hall or cathedral. Again, there is no substitute for experimentation.
About the special eects programs
This section gives details of the eects programs available on the DN780 Reverb eect.
Direct signal
Eects such as ‘ADT’ and ‘Echo’ rely on a suitable level of direct (dry) signal being added on the mixing console. Since this is largely a question of taste, no precise
instructions are included here. It is recommended that, as a general principle, direct signal is initially set at a normal operation level without any eect present. The
eect is then increased in level as required.
“Delay” eect
PRE DELAY control knob adjusts the delay time within the range 0 to 2.0 seconds.
REV button mutes the eect.
Preset parameters: On selecting this eect program, delay is set to 200 ms.
Stereo mix: The signals at left and right outputs are both delayed by the same amount as set using the PRE DELAY control, that is, they are essentially monophonic.
Application Notes:
• Use this program to accurately balance echo return levels on the mixing console.
• In normal use, only one output should be used.