Trinnov Audio Altitude 32, User Manual

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
Optimize (Optimization Modes): The Altitude 32 offers 4 different optimization modes with very specific
behavior:
o
Amplitude + Phase (default): with this setting, the Optimizer will improve both the loudspeaker
amplitude and the phase response of the loudspeaker. This greatly reduces the group delay of the
speakers starting from about 150Hz.
o
Amplitude only: this mode tells the Optimizer to work only on the amplitude of the loudspeaker’s
response. The phase behavior is not modified;
o
Low range only: with this setting the automatic equalization will only use IIR filters up to the frequency
defined in the advanced settings (Default: 150Hz). The automatic FIR filter is disabled, but manual FIR
EQ can still be applied;
o
According to L&R speakers: this is a special mode that will optimize the other speakers in order to
achieve the same response as the averaged Left+Right speakers. The different options available for this
mode are explained in the Advanced Optimization Settings subchapter.

Maximum Boost/Attenuation:
o
Maximum boost: defines, in dB, the maximum amount of boost that will be performed by the algorithms.
This parameter is used to avoid distortion. Its default value is 6dB.
This parameter has an important impact on the behavior of the automatic equalization, and is applied
to both the time-based and the energetic approach.
o
Maximum attenuation: defines, in dB, the maximum amount of attenuation that will be performed by the
algorithms. Its default value is -10dB.
This parameter also has an important impact on the behavior of the automatic equalization, and is
applied to both the time-based and the energetic approach.
See also the Limiter Curve functionality described below.

Acoustic parameters “Quantity of Early Reflections” and “Resolution of Energy Response”:
The Altitude
32 uses two different approaches for the Optimization of Loudspeaker/Room Acoustics:
1. A time-based approach for the correction of Early Reflections (ER). The main parameter that defines the
behavior of this algorithm is the width of the time-frequency window “Quantity of Early Reflections”.
Quantity of Early Reflections (default is 3 cycles): A simple parameter that characterizes the quantity of
early reflections that the Optimizer tries to compensate is the width of the time-frequency window. The size
of this window is defined by a number of cycles, hence the naming “

/f”, where

(alpha) is the number of
cycles and f the frequency (1/f being one cycle).
The meaning of the time-frequency window is as follows: for each frequency a different duration (or width
of the time window) is taken into account. At low frequencies the window typically starts at 150ms for 20Hz,
and decreases constantly to be as low as 0.3ms at 10 kHz.
2. An energetic approach for the correction of Late Reverberation (LR), whose main parameter, Resolution of
Energy Response is the smoothing applied to the energy response.
Resolution of Energy Response (default is 1/3 octave): It defines, in number of octaves, how the room’s
energy response is smoothed, and modifies the behavior of the equalization performed by the Optimizer on
the Late Reverberation. Its default value is 1/3 octave.
The behavior of the energy optimization algorithm varies according to the smoothing applied to the room’s
response. If the response is less smoothed, sharp peaks in the response will be more taken into account
for the correction, while with more smoothing only the overall tonal balance of the room will be corrected.