uda1331h NXP Semiconductors, uda1331h Datasheet - Page 14

• Manufacturer Part Number: uda1331h
• Description: Universal Serial Bus Usb Audio Playback Peripheral App
• Manufacturer: NXP Semiconductors

Philips Semiconductors
B
The bass control is available for the master channel of the UDA1331H. Bass can be regulated in three modes: minimum,
flat and maximum mode. The preferred mode is selected at start-up of the device (configuration map). The Bass range
is from 0 to about 14 dB (minimum mode) or about 24 dB (maximum mode) in steps of 2 dB. It should be noted that the
negative bass values as defined in the “USB Device Class Definition for Audio Devices” are not supported by the
UDA1331H; the 0 dB value is returned as 0 dB. The maximum Bass value which will be reported to the host is always
24 dB independent of the mode. The maximum mode is the most accurate mode when the Bass values are reported to
the host. The corner frequency is 100 Hz for the minimum mode and 75 Hz for the maximum mode. Table 5 gives the
mapping of the bBass value upon the actual bass setting of the USB APP.
Table 5 Bass control characteristics
1998 Oct 06
ASS CONTROL
Universal Serial Bus (USB) Audio
Playback Peripheral (APP)
B7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
B6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
B5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
0
B4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
0
1
1
0
bBASS
B3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
1
0
1
0
1
0
B2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
1
1
1
1
1
B1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
0
0
0
0
0
0
14
B0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
1
1
1
1
1
BASS USB
SIDE (dB)
13.25
15.25
17.25
11.25
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
2.75
3.00
3.25
5.25
7.25
9.25
...
...
...
...
...
...
...
...
minimum
10.2
13.7
11.9
1.1
2.4
3.7
5.2
6.8
8.4
0
BASS USB APP (dB)
Preliminary specification
flat
0
0
0
0
0
0
0
0
0
0
UDA1331H
maximum
11.3
13.3
15.2
17.3
1.7
3.6
5.4
7.4
9.4
0