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Table Of Contents
496 EFFECTS MENU
envelope curve. You can optically control the impulse response envelopes on the graphic
display.
Crossover: Here you can set the time length of the first of the two segments of the
envelope curve. With this parameter you can influence the dampening of the earlier
reflections.
Parameters for editing reverb frequencies
Lows: Using this parameter you can adjust the low frequency component of the reverb.
Highs: Using this parameter, you can adjust the high frequency component of the reverb.
FFT EQ: The reverb component can be edited with an additional FFT filter. The graphic
display with real-time spectrum of the reverb component in the FFT filter allows optical
control of the frequency characteristics of the room, where the impulse response was
recorded. This way undesired responses can found and removed quickly.
With small settings (< 4096 samples) the FFT filter is not available for the latency parameter.
This is because its linear functioning brings about even larger latency.
Mix, Volume, Reset
Original: Here you can set the original signal level in dB.
Reverb: Here you can set the reverb level in dB.
Volume: Here you can set the master output level in dB.
Reset: Here you can set the level to its original position.
Performance/Options
Quality: in both "normal" modes the room stimulation will be calculated using only half the
sampling rate. In most cases this will be quite enough, since natural impulse responses and
even impulse responses generated by digital reverb devices rarely posses components
above 10 kHz (you can check this in the spectral representation of the integrated FFT filter).
Many other reverb devices work internally with the half-rate, since calculation over the
entire frequency range would be a waste of CPU capacities.
The difference between the two "normal" modes lies only in the quality of resampling that
leads to sampling rate reduction. In "Normal plus" mode the resampling quality is higher.
The required calculation performance is slightly raised in this mode.
In the "high" mode, the entire frequency scale will be calculated. The CPU load doubles in
comparison to the "normal" mode.
Internal block length: This parameter specifies a block length with which the convolution
function can be calculated internally.
Short block lengths raise the count of the required calculation operations, causing CPU
strain to increase. Large block lengths lead to uneven CPU loads. The parameter has no
effect on the calculation result itself.
The optimum for real-time processing tends to be about 16384 to 32768 samples.