Settings | 17
9 : 10.DSP Settings: Common settings
The KDSP is an advanced digital sound processor board
based on a floating point SHARC® DSP.
KDSP can be used to optimize the performance of the
audio system by means of fully customizable crossovers
and equalizers. Exceptionally high reliability is guaranteed
in all conditions by advanced limiters, and continuously
monitored loudspeaker parameters. This chapter illustrates
the features and operational modes of the KDSP board.
9 : 10.1. Source selection
This menu allows to choose the input signal to be pro-
cessed by the DSP. The possible options are:
f
f
Stereo
: the signal coming from channel 1 is processed
and routed out to output channel 1. Similarly, the input
signal coming from Channel 2 is processed and then
routed out to output channel 2.
f
f
Parallel from CH1
: the input signal from channel 1
feeds two parallel, distinct and independent process-
ing branches. The result of one branch is sent to
output channel 1, while the result of the other branch is
sent to output channel 2.
f
f
Parallel from CH2
: the input signal from channel 2
feeds two parallel, distinct and independent process-
ing branches. The result of one branch is sent to
output channel 1, while the result of the other branch is
sent to output channel 2.
f
f
Mono Mix
: the input signals from channel 1 and 2 are
summed together and routetd to both output channels
in order to maintain a consistent output level.
9 : 10.2. AES3
This menu controls the AES3 input stream options. The
AES3 source can enter the amplifier from the rear XLR con-
nector or from the KAESOP board (if present) based on the
type of input selection (ref.
Chapter 9 : 3.Amplifier settings:
Input select
).
9 : 10.2.1. Gain trim (dB)
This menu allows the user to set the gain to be applied
to the signal coming from the AES3 digital input. Setting a
0 dB gain makes the full-scale digital signal equivalent to a
20 dBu analog input signal.
9 : 10.2.2. If no link
This menu controls the amplifier’s behavior should the
AES3 signal connection fail or become unreliable. The AES3
connection is considered unreliable when transmission
errors are greater than 1% of total data transmitted. The
possible options are:
f
f
Mute
: when the AES3 connection fails, the amplifier
mutes the output.
f
f
Analog
: when the AES3 connection fails, the amplifier
will rely on the analog input as backup. This source
signal switching is done in real time in order to avoid
any glitches in the audio feed. If the input levels are
correctly matched between analog input and AES3
input (use the AES3 Gain trim parameter), the switch
between AES3 and analog will be inaudible.
When using the analog input to backup a failed AES3
feed, the analog input connection must be setup based on
source type of input AES3 stream:
f
f
AES3 from rear XLR
– the primary audio signal for
this configuration is an AES3 fed via the rear XLR
(AES3
DSP
Out ref.
Chapter 7 : 4.Digital Input
).
The backup analog cable, with an analog signal identi-
cal to that provided by AES3, should be plugged in
the channel 1 XLR input. If the AES3 feed should fail,
the amplifier will automatically fall back to channel 1
analog input (we suggest to set the DSP source selec-
tion to “Parallel from CH1”). The signal levels of both
primary AES3 and backup analog signals should be
carefully matched. This can be done using the gain
trim parameter or by adjusting the analog signal level.
f
f
AES3 from KASEOP
– the primary audio signal for
this configuration is an AES3 fed via the RJ45 port
(KAESOP
DSP
Out ref.
Chapter 7 : 4.Digital Input
).
The backup analog cable, with an analog signal
identical to that provided by the KAESOP, should be
plugged in the channel 1 XLR and channe 2 XLR (set
to analog) connectors. The DSP’s source selection
can be set to any possible input. If the KAESOP feed
should fail, the amplifier will automatically fall back to
the analog input on the channels 1 and 2. The signal
levels of both primary KAESOP and backup analog
signals should be carefully matched. This can be
done using the gain trim parameter or by adjusting the
analog signal level.
When the AES3 stream is lost and the analog backup
kicks in, a message on the front panel is displayed and if a
remote client (e.g. Armonía) is connected to the amplifier, an
alarm is sent to it.
Analog back up cabling
carrying the same signal as the CH1 of the AES3 feed
Digital main cabling
IN1
(analog)
IN2
(AES/EBU)
CH1 out
CH2 out
DSP Source Selection mode: Parallel from CH1
main digital connection
analog backup connection
(used if digital fails)
carrying the same signal as the CH1 of the AES3 feed
IN1
(analog)
IN2
(analog)
CH1 out
CH2 out
carrying the same signal as the CH2 of the AES3 feed
Analog back up cabling
Analog back up cabling
Main digital AES3 stream via RJ-45
CH1
CH2
CH1
CH2
DSP Source Selection mode: Parallel from CH1
main digital connection
analog backup connection
(used if digital fails)
FIGURE 26: AES3 from XLR.
Analog back up cabling
carrying the same signal as the CH1 of the AES3 feed
Digital main cabling
IN1
(analog)
IN2
(AES/EBU)
CH1 out
CH2 out
DSP Source Selection mode: Parallel from CH1
main digital connection
analog backup connection
(used if digital fails)
carrying the same signal as the CH1 of the AES3 feed
IN1
(analog)
IN2
(analog)
CH1 out
CH2 out
carrying the same signal as the CH2 of the AES3 feed
Analog back up cabling
Analog back up cabling
Main digital AES3 stream via RJ-45
CH1
CH2
CH1
CH2
DSP Source Selection mode: Parallel from CH1
main digital connection
analog backup connection
(used if digital fails)
FIGURE 27: AES3 from KAESOP.
