Ecler ECLERNET MANAGER - Manual (Page 85)

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 Low-Pass y High-Pass with a 6 or 12 dB/oct slope (FREQUENCY): these are low-pass
and high-pass filters with adjustable cut-off frequency (between 20 Hz and 20 kHz).
 All-Pass order 1 and 2 (FREQUENCY in both, Q in order 2 only): all-pass filters that do
not affect the signal amplitude, but the phase at certain frequencies (in contrast with
delay, which changes phase at all frequencies). The main application of this type of filter
is usually to compensate phase errors in speakers or phase shifts introduced by
crossover filters
7.7.4. DELAY
The DELAY section allows you to adjust an independent time delay for each output
channel. This function is useful for example to temporarily align the different ways
of a loudspeaker cabinet, using an output with a corresponding delay for each one
of them.
The delay time can be specified in different units, which are determined by the UNITS selector (up and
down arrows to the right of the text box). Available units are milliseconds, seconds, centimetres and
meters. DELAY can be set between 0 and 1000 milliseconds.
To avoid weird and annoying noises in the output signal, the value change made with the DELAY
potentiometer is not effective until the mouse button is released. At that time audio will be temporarily
muted (for a variable time, depending on the delay value used) for the new setting to be effective.
7.7.5. LIMITER
The limiter section offers a dynamic processing of the output signal, allowing you
to limit its maximum level. This function is very useful for example when you want
to moderate the maximum volume produced by the speakers of the system for
several possible reasons, one of them (very obvious) being to avoid exceeding
their power handling capacity to protect them from a failure. Available settings
are:
 ENABLE/DISABLE: enables/disables the limiter (green button/grey
button). When in DISABLE mode, the rest of the section controls are
disabled.
 THRESHOLD: limitation threshold. Specifies the output signal level at
which limitation begins to occur. This parameter ranges from +18 dB to
–36 dB.
 GR (Gain Reduction): VU meter-like indicator of the limitation applied to
the signal, displaying in decibels the reduction of the limiter output signal
compared to the input signal
 ATTACK: attack time. Determines the time the limiter takes to respond when the output level
rises above the threshold. The range covers from 0.1 ms to 500 ms
 RELEASE: determines how quickly the limiter stops acting once the signal output level falls back
below the threshold. In this case, the range covers from 10 ms to 1 s.
Correctly setting limiters' ATTACK and RELEASE times is not an easy task: too short release or attack
times result in excessive and perceptible low frequencies distortion; on the other hand, too long times
could make a limiter useless since it would act too late, letting high intensity signal peaks pass through.