PRELIMINARY DATA SHEET
MSP 34x1G
Table 3–11: Write Registers on I2C Subaddress 12hex, continued
Register
Address
Function
Name
00 04hex
00 33hex
Loudness Loudspeaker Channel
Loudness Headphone Channel
LOUD_MAIN
LOUD_AUX
bit [15:8] Loudness Gain
44hex
40hex
...
+17 dB
+16 dB
04hex
00hex
+1 dB
0 dB
bit [7:0]
Loudness Mode
00hex
04hex
normal (constant volume at 1 kHz)
Super Bass (constant volume at 2 kHz)
Higher resolution of Loudness Gain is possible: An LSB step results in a gain
step of about 1/4 dB.
Loudness increases the volume of low- and high-frequency signals, while keep-
ing the amplitude of the 1-kHz reference frequency constant. The intended loud-
ness has to be set according to the actual volume setting. Because loudness
introduces gain, it is not recommended to set loudness to a value that, in con-
junction with volume, would result in an overall positive gain.
The corner frequency for bass amplification can be set to two different values. In
Super Bass mode, the corner frequency is shifted up. The point of constant vol-
ume is shifted from 1 kHz to 2 kHz.
MICRONAS INTERMETALL
37
MICRONAS [ MICRONAS ]
