MSP 34x1G
PRELIMINARY DATA SHEET
Table 3–11: Write Registers on I2C Subaddress 12hex, continued
Register
Address
Function
Name
SUBWOOFER OUTPUT CHANNEL
00 2Chex Subwoofer Level Adjustment
SUBW_LEVEL
bit[15:8] 0Chex
+12 dB
...
01hex
00hex
FFhex
...
+1 dB
0 dB (default)
−1 dB
E3hex
E2hex
...
−29 dB
−30 dB
80hex
Mute
bit[7:0]
00hex
must be zero
If MDB is added onto the main channel, this register should be set to 00hex
00 2Dhex
Subwoofer Corner Frequency
SUBW_FREQ
bit[15:8] 5...40
corner frequency in 10 Hz steps
(range: 50...400 Hz)
If MDB is active, SUBW_FREQ must be set to a value higher than the MDB Lowpass
Frequency (MDB_LP). Choosing the corner frequency of the subwoofer closer to
MDB_LP results in
a narrower MDB frequency range. Recommended value:
1.5×MDB_LP
Subwoofer Complementary High-Pass Filter
SUBW_HP
MDB_STR
bit[7:0]
00hex
01hex
loudspeaker channel unfiltered
a complementary high-pass is processed in the loud-
speaker output channel
02hex
MDB added onto main channel
MDB CONTROL REGISTERS
00 68hex
MDB Effect Strength
bit[15:8] 00hex
7Fhex
MDB OFF (default)
maximum MDB
bit[7:0]
00hex
must be zero
The MDB effect strength can be adjusted in 1 dB steps. A value of 44hex will
yield a medium MDB effect.
00 69hex
MDB Amplitude Limit
MDB_LIM
bit[15:8] 00hex
0 dBFS (default limitation)
FFhex
...
−1 dBFS
E0hex
−32 dBFS
bit[7:0]
00hex
must be zero
The MDB Amplitude Limit defines the maximum allowed amplitude at the output
of the MDB relative to 0 dbFS. If the amplitude exceeds MDB_LIM, the gain of
the MDB is automatically reduced. Note that the Volume Clipping Mode must be
set to “dynamic” (see page 32).
38
Micronas
MICRONAS [ MICRONAS ]
