Harman Kardon AVR 100 Technical Manual page 28

8. Sound Field Effect (Hall, Theater)
CMPDAT/
DAI
Effects Enable
Fig. 3 is a function block diagram of the application code when configured for Effect Processing. It gives an idea of
the interaction between the various application modules when the effects are enabled.
9. Bass Management
X X X
-1 -1 -1
Z Z Z
The Bass Manager is best described with the use of a block diagram.
Fig. 4 shows the topology of the filter used for both the low pass and high pass filters. This filter represents two first
order filters cascaded to implement a second order filter. Depending on the coefficient values, either a second order
low pass or second order high pass can be implemented. The default 3dB frequency for this filter is 100Hz. The
corner frequency can be changed by downloading new values for the coefficients a1, b0 and b1.
AUTODETECT
Enable
2(L, R)
Autodetect
(PCM)
2(Ls, Rs)
Reverb Out
Effects
Channel
FIR Out
Processing
Mixer
2(L, R)
Fig. 3 Effect Code Block Diagram
b0 b0 b0
b1 b1 b1 a1 a1 a1
Fig. 4 Filter Topology
TEST IMPULSE
Enable
Deemphasis
Deemphasis
Test
Impulse
FIR Enable
Divider
FIR
Bass
Mgr
3.1(L,C,R,LFE)
Bass Param
Output Mode
b0 b0 b0
-1 -1 -1
Z Z Z
b1 b1 b1
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2(L, R)
Enable
5 .1
5 .1
Audio
Mgr
Volume/Mute
Remap
-1 -1 -1
Z Z Z
a1 a1 a1
AVR100 / AVR200
Y Y Y