User Manual
47
V 1.1
2022-09-12
User manual for MERUS™ audio amplifier configurato
r
MA2304DNS/MA2304PNS
DSP audio blocks
Table 16
Band1 and Band2 frequency controls
Control name
Description
Min.
Default
Max.
Unit
Band1 frequency
Crossover frequency between low
band and mid band
10
500
F
s
/2
Hz
Band2 frequency
Crossover frequency between mid
band and high band
10
500
F
s
/2
Hz
Three-band DRC controls
The three-band DRC has four controls per band. There is the option to adjust the threshold where compression
begins, the compression ratio (as a percentage) above the threshold as well as attack and release times. The
attack time is the time it takes the compressor to decrease gain by 10 dB. Similarly, the release time is the time
it takes the compressor to increase gain by 10 dB.
Table 17
Three-band DRC controls
Control name
Description
Min.
Default
Max.
Unit
Threshold
The input level in which
compression begins
Low band
-48
0
24
dB
FS
Mid band
-48
0
24
dB
FS
High band
-48
0
24
dB
FS
Compression
The compression ratio above the
threshold knee:
0 percent = 1:1,
75 percent
= 4:1 …
Low band
0
50
100
%
Mid band
0
50
100
%
High band
0
50
100
%
Attack time
The time period it takes the
compressor band to attenuate
by 10 dB
Low band
0
0
2048
ms/10 dB
Mid band
0
0
2048
ms/10 dB
High band
0
0
2048
ms/10 dB
Release time
The time period it takes the
compressor band to increase
gain by 10 dB
Low band
8
16384
16384
ms/10 dB
Mid band
8
16384
16384
ms/10 dB
High band
8
16384
16384
ms/10 dB
