Kurzweil K2500 Reference Manual page 25

To gain control over the growth of reverberation, the left and right inputs each are passed through an ÒinjectorÓ that
can extend the source before it drives the reverberator. Only when Build Env is set to 0% is the reverberator driven
in pure stereo by the pure dry signal. For settings of Build Env greater than 0%, the reverberator is fed multiple
times. Build Env controls the injector so that the reverberation begins abruptly (0%), builds immediately to a
sustained level (50%), or builds gradually to a maximum (100%). Build Time varies the injection length over a range
of 0 to 500ms. At a Build Time of 0ms, there is no extension of the build time. In this case, the Build Env control
adjusts the density of the reverberation, with maximum density at a setting of 50%. In addition to the two build
controls, there is an overall Pre Dly control that can delay the entire reverberation process by up to 500ms.
Parameters:
PAGE 1
Wet/Dry 0 to 100%wet
Room Size 2.0 to 15.0 m
Pre Dly 0 to 500 ms
HF Damping 16 to 25088 Hz
PAGE 2
Bass Gain -15 to 0 dB
Lowpass 16 to 25088 Hz
LFO Rate 0.00 to 5.10 Hz
LFO Depth 0.00 to 10.20 ct
Wet/Dry
Out Gain
Decay Time
HF Damping
Room Size
Bass Gain
Out Gain
Diffusion
Decay Time
Build Time
Build Env
The amount of the stereo reverberator (wet) signal relative to the original input (dry)
signal to be output. The dry signal is not affected by the Bass Gain control. The wet
signal is affected by the Bass Gain control and by all the other reverberator controls. The
balance between wet and dry signals is an extremely important factor in achieving a
good mix. Emphasizing the wet signal gives the effect of more reverberation and of
greater distance from the source.
The overall output level for the reverberation effect, and controls the level for both the
wet and dry signal paths.
The reverberation decay time (mid-band ÒRT
reverberation has died away to 60dB below its ÒrunningÓ level. Adjust decay time
according to the tempo and articulation of the music and to taste.
Adjusts lowpass Þlters in the reverberator so that high frequencies die away more
quickly than mid and low frequencies. This shapes the reverberation for a more natural,
more acoustically accurate sound.
Choosing an appropriate room size is very important in getting a good reverberation
effect. For impulsive sources, such as percussion instruments or plucked strings,
increase the size setting until discrete early reßections become audible, and then back it
off slightly. For slower, softer music, use the largest size possible. At lower settings,
RoomSize leads to coloration, especially if the DecayTime is set too high.
Adjusts bass equalizers in the reverberator so that low frequencies die away more
quickly than mid and high frequencies. This can be used to make the reverberation less
muddy.
FXAlg #13: Stereo Hall
Off, -79.0 to 24.0 dB
0 to 100%
0.5 to 100.0 ms
0 to 500 ms
0 to 100%
Ó), the time required before the
60
Algorithm Reference-25