Solidyne 562dsp, User Manual

Page: 22 / 44

22 SOLIDYNE
ORION 462 MKII
•
Of no way is recommendable to change values
“completely without information”, without knowing how will
affect each change to the sound of the radio.
•
Finally, an encouraging commentary; these adjustments
are zero risk, because you always will be able to return
from the default program, that never change.
4.4 PROGRAM ADJUSTMENTS
Choose
“Edit PGM”
from main menu to access to
this option. The screen shows the blocks diagram
of the processor, showing the main stages
involved in the audio processing. The procedure is
the same one that in other screens. Turn the JOG
to select a stage and touch briefly to enter.
LISTENING THE SOUND
•
Next you will see the different ways to create or to
modify the sound of a program. Each change that you
make will listen on the air. Therefore you will have to
listen carefully with a good receiver (better still tuning
Walkman or and an audio amplifier of high quality, with
good loudspeakers). Not to listen the signal directly from
the audio output of 562dsp, but the on-air signal.
4.4.1 PROGRAM NAME
Allows change the program name. Press briefly on
this option to enter to the edit mode.
• The characters are changed turning the JOG. To
confirm press briefly the JOG.
•
To confirm the changes, press and hold on OK.
•
To cancel and leave this screen, press and hold on
any character.
4.4.2 EXPANDER / AGC
4.4.2.1 AGC OUT GAIN
The output level of the AGC is a CRITICAL
ADJUSTMENT, since it determines the level with
the signal reaches the multiband compressors,
and therefore the compression degree that will be
applied.
So the action of the multiband compressors
depends on AGC output level. LOUDNESS
BANDS indicators show the compression degree
applied by the multiband system. Each band has
its own indicator.
Usual values for the AGC output are between +3
to +9 dB.
TAKE IN MIND
•
How much greater the compression degree is, more
loudness has the program on the air. But high
compression levels (greater than 15 dB) can produce a
“confuse” sound in certain type of music (hyper-
processed, of high density) and excessive alteration of the
timbre (with soloists’ voices or instruments). For this
reason AGC OUT it's a critical adjustment and you must
pay special attention to this control.
4.4.2.2 AGC attack time
The attack time is the time that the AGC takes to
reduce its gain when the input signal increases.
Like general rule, it can say that for voices short
times of attack must be used (500 ms); whereas
for music longer times are preferred (3 to 4
seconds).
Note that when the input signal increases quickly,
during the AGC attack time the signal is contained
by the multiband compressor that will act strongly
until the AGC compensates their level. Depending
on the adjustments of the following stages, a too
slow attack of the AGC can cause an excessive
compression of the signal (mainly with voices)