Marani LPP-480F, Руководство пользователя

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When the “Magn+Phase” mode is selected, the phase smoothing is always applied to the whole
frequency range, even if the threshold is not equal to 0dB.
The following picture shows the phase smoothing effect, by comparing the group delay response
before (left side plot) and after (right side plot) enabling the smoothing.
- Latency
The latency parameter allows to control the I/O delay added by the FIR filtering. As a general rule,
higher latencies should be preferred where the compensation accuracy is the main target, while
lower latency values is often used in live sound system, where the I/O delay is a critical application
parameter.
The effectiveness in reducing the latency, leaving unchanged the compensation capability of the
FIR filter, depends on the original loudspeaker IR, but, in the most cases, latency values greater or
equal to 2.5ms allow to preserve almost unchanged the filter correction effects.
The following pictures compare the frequency responses (both in magnitude and group delay) of
two filters with a latency value of 5ms (in the left side graph) and of 2.5ms (in the right side graph).