Filter
Top Products
1999 May 10 18
Philips Semiconductors Preliminary specification
Universal Serial Bus (USB) CODEC UDA1325
Treble control
For the playback channel, treble can be regulated in three audio modes: minimum, flat and maximum mode. In flat mode
the audio is not influenced. In minimum and maximum mode, the treble range is from 0 to 6 dB in steps of 2 dB.
The programmable treble filter is implemented digitally and has a fixed corner frequency of 3000 Hz for the minimum
mode and 1500 Hz for the maximum mode. Because of the exceptional amount of programmable gain, treble should be
used with adequate prior attenuation, using volume control.
Table 11 Treble settings
Bass control
For the playback channel, bass can be regulated in three audio modes: minimum, flat and maximum mode. In flat mode
the audio is not influenced. In minimum mode the bass range is from 0 to approximately 14 dB in steps of 1.5 dB.
In maximum mode, the bass range is from 0 to approximately 24 dB in steps of 2 dB. The programmable bass filters are
implemented digitally and have a fixed corner frequency of 100 Hz for the minimum mode and 75 Hz for the maximum
mode. Because of the exceptional amount of programmable gain, bass should be used with adequate prior attenuation,
using volume control.
TR4 TR3 TR2 TR1 TR0
TREBLE (dB)
FLAT SET MIN. SET MAX. SET
00000000
00001000
00010000
00011000
00100022
00101022
00110022
00111022
01000044
01001044
01010044
01011044
01100066
01101066
01110066
01111066
... ... ... ... ... 0 6 6
11111066