Barco Iosono Core R9801500 Скачать руководство пользователя страница 57

Страница: 57 / 65

8. Advanced System Tuning With The System Tuning Extension

2. Click on the

Whitelist

button on the right. This button will open a matrix called

Measurement Whitelist

containing all selected

and measured speakers as rows and all measured microphone positions as columns. Select only green speaker cells - click

to close the

Whitelist

dialogue. (image 8-5)

Note:

Red matrix cells indicate corrupt measurements. Place the cursor on one of the matrix cells to display the measurement
check’s results at the bottom of the window. Only checked measurements are taken into account for the creation of the

lters. Therefore, all measurements colored green are checked as default. Deselect cells colored red to avoid use of

corrupt measurements. Right click on the matrix to access global de-/select all commands. You can also inspect the
impulse responses in the whitelist window by right-clicking while the cursor is above a matrix cell. Select Show impulse
response from the context menu.

3. Click the

Preprocess

button. This will automatically window, average and smooth the measurements according to the

Kit Pa-

rameters Smoothing

. You can

nd a description of smoothing parameters in this section’s step 7. A progress bar will indicate

the progress of the preprocessing, stating the number of speaker and microphone positions that is being included.

4. All selected and measured speakers can be displayed as red frequency response curves in the upper main display. Use the

Fullscreen-

Show none-

Show all-

and

Show single-

Icons to display the frequency response in full screen, of all, none or

single measured speakers as red curves. Choose a certain speaker and subwoofer to be displayed in

Show single mode

using

the drop down list next to the buttons. (image 8-6)

Note:

The only graph visible in all modes is the target curve (blue). This graph represents the desired, spatially averaged
frequency response which is the tuning goal for all loudspeakers including subwoofers. The frequency response of each
speaker always refers to the speaker’s direct sound and is a result of the average of all measurement positions.

5. De

ne a target curve for the IOSONO system’s overall frequency response based on the measurement results. The target

curve can be edited by drag and drop of the blue dots. Furthermore you can select the grabbers by left click and edit

Gain

and

Frequency

in the edit

elds below the diagram. Initially, set the target curve with a high frequency roll-off that matches the

shallowest displayed response of the measured speakers. The

System Tuning Extension

calculates

lters for the system’s

subwoofers as well. They are designed toward the same target curve as the other loudspeakers.

Note:

For tuning IOSONO systems toward the SMPTE X-Curve, its characteristics can be applied to the target curve. The
standard X-Curve has a HF slope falling with -3dB/Oct beyond 2 kHz and -6dB/Oct beyond 8 kHz.

6. Adjust the two green lines (

Relevance Scope

) in a way that the measured responses, red curves are fully included between the

green lines above their cut-off frequencies. The shape of the

Relevance Scope

can be edited by drag and drop of the green

squares. Furthermore you can select the grabbers by left click and edit

Gain

and

Frequency

in the edit

elds below the diagram.

(image 8-7)

Note:

By default, the Filter Creation Kit Speaker default shows two green hori- zontal lines that de

ne the relevance scope of

the

lters. Phenomena of measured responses that overhang the relevance scope will not be corrected by the

lters.

The relevance scope follows changes of the target curve.

7. To add or remove additional

lter creation kits press the

buttons. When adding a new kit the user may name the

Filter Kit

and choose to copy settings from other kits. (image 8-8)

Note:

For maintaining a common target curve but being able to manage differences in relevance scope and preprocessing
settings for multiple speaker groups, copying Filter Kit setting is a useful feature.

8. Press

Import

to make previous curve settings available. Select a desired measurement session from the path it has been trans-

ferred to the IOSONO CORE’s internal memory.

9. In

Kit Parameters

, make speci

lter settings for

lter kits assigned to loudspeaker groups. (image 8-9)

Note:

In the kit parameters the

lters’ frequency range is divided into three smoothing sections. Thus,

lters can be smoothed

with frequency dependent resolution. The intervals range from 1Hz to the lower frequency (Low), from the lower to the
higher frequency (Mid) and from the higher frequency to 24 kHz (High). The smoothing section’s frequency borders and
the smoothing resolution can be edited using the smoothing parameters. Select the two provided Filter Creation Kits
Speaker Default and Subwoofer Default and see the changes applied to each kit. In Subwoofer Default the setting will
design

lters with equalization between the frequency boundaries of 10 Hz to 100 Hz as compared to Speaker Default

where setting will design

lters from 100 Hz to 15 kHz with an optimization to 20 kHz. The active frequency range of the

lters can be de

ned using the edit

elds Compensation from and to in each group. The

lters will affect the frequency

response only between these two speci

ed frequency boundaries. The according frequencies are represented in the

diagram by vertical green lines. Below the lower frequency, the

lter is set to unity. Selecting HF optimization to activates

equalization of the speakers’ high frequency behavior beyond the upper boundary frequency. The HF optimization adapts
the speaker’s frequency response to the target curve without energy equalization of the full interval. The upper frequency
boundary for the HF optimization can be de

ned, too. If you disable the HF optimization the

lter is set to unity beyond

the upper boundary frequency.

10.Press the Design Filters to start the actual calculation of the

lters based on the given parameters. (image 8-10)

Note:

Changing the measurement choice,

lter boundaries and other fundamental

lter properties will require to redo the pre-

processing. This condition is displayed by a highlighted Preprocess button. A new preprocessing run and changes of
the

lter characteristics itself, like target curve etc. requires to recalculate the

lters in order to apply the new settings.