uda1321 NXP Semiconductors, uda1321 Datasheet - Page 16

• Manufacturer Part Number: uda1321
• Description: Universal Serial Bus Usb Digital-to-analog Converter Dac
• Manufacturer: NXP Semiconductors

Philips Semiconductors
B
The bass control is available for the master channel of the UDA1321. 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
UDA1321; 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 DAC.
Table 5 Bass control characteristics
1998 Oct 06
ASS CONTROL
Universal Serial Bus (USB)
Digital-to-Analog Converter (DAC)
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
16
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)
11.25
13.25
15.25
17.25
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
11.9
13.7
1.1
2.4
3.7
5.2
6.8
8.4
0
BASS USB DAC (dB)
Preliminary specification
flat
0
0
0
0
0
0
0
0
0
0
UDA1321
maximum
11.3
13.3
15.2
17.3
1.7
3.6
5.4
7.4
9.4
0