Trinnov Audio Altitude16, User Manual

Page: 115 / 156

User manual
115
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 constantly
decreases to be as low as 0.3ms at 10 kHz.
2. An amplitude-based 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 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.
7.3 _TARGET CURVE
The Altitude
16
implements Target Curves as a powerful tool for achieving the required
frequency response from your system. For every speaker in the room, a target curve can
be defined in terms of:
Amplitude only / Amplitude and Phase / Amplitude and Group Delay
One or more channels can be linked to share the same target curve for several speakers.
7.3.1 _OVERVIEW OF THIS PROCEDURE
In the Altitude
16
, setting target curves is a very straightforward procedure:
• Decide if you want to apply the same target curve to all the speakers (except subwoofers) or if you want to apply a different
target curve depending on the type of speaker.
• Link/unlink the speakers that will share the same target curve.
• Setup the target curve for each group of speakers.
• Press the Apply Change button.
7.3.2 _SETTING UP ONE OR MORE TARGET CURVES
To edit the target curve for one or more speakers, go to the Optimizer Settings/Target
Curve page in the Advanced Settings interface:
In some cases, the goal would be to link all the speakers except the subwoofer(s). Therefore, by default, the link button is
activated for all the speakers except for the subwoofer(s). If this is not the case, you can press the link all but Sub button.
Use the arrow keys of your keyboard or your mouse to edit the target curve.
Use the arrow keys of your keyboard or your mouse to edit the target curve:
• The green dots correspond to the required values for each frequency,
• The yellow line displays the expected result, taking into account the behavior of the filter.
Press the Apply Changes button. This button becomes orange as soon as you change some setting that requires a new
computation of the optimization filters.