Trinnov Audio Altitude16, User Manual

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User manual
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• Processing on L&R target (Default is IIR only): If the optimize mode is set to “Optimize according to L&R speakers” in
the main settings tab, the Optimizer only uses IIR filters on the L&R speakers. This can be switched to “None” to make
sure the L&R speakers are not optimized at all.
• Align L&R on target (Default is On): If this setting is on, the Optimizer applies filters on the Left & Right speakers using their average
response as target. If this setting is off, only the center and surround channels are optimized.
• Optimizer Phase (Default is On): Determines whether the Optimizer should optimize the phase response of the speak-
ers or not when the According to L&R speakers mode is on.
7.5.6 _FIR AND IIR SETTINGS
FIR stands for Finite Impulse Response. FIR filters are used to optimize amplitude and/or
phase. IIR stands for Infinite Impulse Response. IIR filters are minimum phase filters used
by the automatic compensation in addition to FIR for the low frequencies.
• FIR filter length (default is 100ms): Defines the length or number of taps of the FIR filter. The longer the FIR filter, the
higher the resolution the correction.
• Number of IIR filters (default is 10): The number of IIR filters that will be used on every channel.
• IIR filters minimal/maximal frequency (default is Automatic/150Hz): IIR filters will be positioned from the min
frequency up to the max frequency. The Automatic parameter uses the minimum frequency of the speaker bandwidth and
the Low-freq auto transition bandwidth parameter to calculate the IIR filter minimal frequency.
• Resolution of energy response for IIR: you can select a different resolution for IIR and FIR.
• Low-freq auto transition bandwidth (default is 1 octave): Determines the bandwidth of the auto transition. The auto
transition is the frequency range that separates the Optimized frequency range from the unfiltered frequency range in the
low end. The upper boundary of this auto transition bandwidth is the minimal frequency of the bandwidth of the speaker.
• Room smoothing method (default is Modulus): For advanced users only.
• Norm used for level_hp (!= align) (default is Room): For advanced users only.
7.5.7 _LEVEL ALIGNMENT SETTINGS
• Weighting used for levels (default is dBA): Sets the type of weighting used by the optimizer for level alignment.
• Width of level window ( default is 16/f): This time-frequency window is used to compute the perceptual level of every
speaker. Its width can be modified to improve the automatic level alignment.
• Maximum/minimum gain on speakers (default is 10dB/-20dB): defines the maximum/minimum gain that will be
applied for the automatic level alignment.
• Minimal/maximal bandwidth frequency (default is 10Hz/Unlimited): defines the high end/ low end of the bandwidth
that is used as the starting point for level computations.
• Bandwidth determination mode (default is Normal): Defines how wide is the angle used for the speakers automatic
• bandwidth determination mode from measurements.
7.5.8 _SUBWOOFER LOW-PASS FILTER SETTINGS
The Optimizer includes a subwoofer low-pass filter with the following options:
• Cutoff frequency (Default is “disabled”): Defines the cutoff frequency for the low-pass filter that can be applied to the
subwoofer.
• Filter type (Default is Butterworth): Defines the type of filter used at the cutoff frequency. The elliptic filter is sharper
than the Butterworth but shows ripples in the whole bandwidth.
• Filter order (Default is 4): Defines the steepness of the filter. The slope gets stiffer as you increase the filter order. Please
be aware that such changes may result in significant phase shifts.
• Rp value (For elliptical filter) (default is 0.1 dB): Sets a maximum amplitude ripple above the cutoff frequency.
• Rs value (For elliptical filter) (default is 80 dB): Defines the attenuation below the cutoff frequency.