Hf Key; Room Size; About The Special Effects Programs; Direct Signal - Midas PRO SERIES Owner's Manual

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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
different sized environments is required. Small room sizes give a confined, '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 effects programs

This section gives details of the effects programs available on the DN780 Reverb effect.

Direct signal

Effects 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 effect present. The effect is
then increased in level as required.

"Delay" effect

PRE DELAY control knob adjusts the delay time within the range 0 to 2.0 seconds.
REV button mutes the effect.
Preset parameters: On selecting this effect program, delay is set to 200ms.
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.

"ADT" effect

PRE DELAY control knob adjusts the delay time before the second voice is heard.
Delay is adjustable within the range 0 to 127ms.
PATTERN control knob selects the number and spacing of the second voices. Selection
is from Pattern 1 (two voices) to Pattern 5 (eight voices).
REV button mutes the effect.
Preset parameters: On selecting this effect program, delay is set to 40ms and pattern
is Pattern 5 (a wide multi-voiced effect).
Stereo mix: Left and right output signals use different delay taps to achieve a stereo
effect. Using only one output halves the number of 'voices', that is, Pattern 1 (one
voice) to Pattern 5 (four voices).
Appendix D: Klark Teknik DN780 Reverb
PRO Series Live Audio Systems
Owner's Manual