AKG DFM 4X4 Quick Reference Manual page 10

4 Operating Notes
4.2.8 Delay
Fig. 8: "Delay" screen.
Fig. 9: Front speaker (1),
delayed rear speaker (2),
microphone (3).
4.2.9 Programmable
Inputs
Fig. 10: "Programmable I/O"
tab, Example 1.
4.2.10 Programmable
Outputs
Fig. 11: "Programmable I/O"
tab, Example 2.
10
~8 m
~22 m
To provide a consistent sound throughout a long and
n a r row hall, you will need a distributed speaker
system. You can set up the delays required for the rear
speakers as follows:
1. Record a plop or a bang on a snare drum.
2. Place a microphone roughly 8 meters from the first
rear speakers (2).
3. Measure the distance between the front (principal)
speakers (1) and the first rear speakers (2).
4. Click on "Audio Delay".
5. Enter the distance you measured in the "Feet" field
(or the "Meters" field if you measured in meters).
6. Put on a pair of good headphones (e.g., AKG
K 240 or K 270).
7. Play the plop or snare drum beat you have recor-
ded in a loop through the sound system and adjust
"Audio Delay" to the point that the sounds coming
from the front speakers (1) and the rear speakers
(2) coincide (you hear only one plop).
8. Repeat steps 1 through 7 for all other delayed
speakers (2).
9. Save your settings to a Preset.
1. Click on "Programmable I/O".
2. Select the Programmable Input you would like to
p rogram (In 1 to In 13) from the "Select
Programmable Input" list on the bottom of the tab.
3. Select the function you would like to execute, a
"Preset Recall" in Example 1.
4. In the "Preset" line, mark the Preset you want to
recall.
If your function is an analog input or output control,
increase or decreases in volume, or a signal mute,
select the corresponding input or output from
"Applies To: Inputs" or "Applies To: Outputs".
5. Click on "Apply".
6. Save your settings to a Preset.
Note that a Programmable Input pin can have a
different function in every Preset.
1. Click on "Programmable I/O".
2. To select the Programmable Output you would like
to program, click on a channel between In 1 and In
8 in the "Select Programmable Input" list on the
bottom of the tab.
3. In the "Function" field, click on "Programmable
Output" to define the selected pin as a
Programmable Output.
4. Select the Programmable Input whose current
state you want to indicate from the "Prog Input
State" list.
In Example 2 (fig. 11), pin 1 is defined as a
Programmable Output. Therefore, "In 1" in the
"Prog Input State" list is gray.
Note: You cannot assign the same pin to two functions
in the same Preset.
5. Save your settings to a Preset.
As with the Programmable Inputs, you can assign
a different function to each Programmable Output
in each Preset.