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1999 May 10 19
Philips Semiconductors Preliminary specification
Universal Serial Bus (USB) CODEC UDA1325
Table 12 Bass boost settings
De-emphasis
De-emphasis is controlled by bit 4 of control register 0. The de-emphasis filter can be switched on or off. The digital
de-emphasis filter is dimensioned to produce the de-emphasis frequency characteristics for the sample rate 44.1 kHz.
De-emphasis is synchronized to the sample clock, so that operation always takes place on complete samples.
BB4 BB3 BB2 BB1 BB0
BASS (dB)
FLAT SET MIN. SET MAX. SET
00000000
00001000
00010000
00011000
0010001.11.7
0010101.11.7
0011002.43.6
0011102.43.6
0100003.75.4
0100103.75.4
0101005.27.4
0101105.27.4
0110006.89.4
0110106.89.4
0111008.411.3
0111108.411.3
10000010.2 13.3
10001010.2 13.3
10010011.915.2
10011011.915.2
10100013.7 17.3
10101013.7 17.3
10110013.7 19.2
10111013.7 19.2
11000013.7 21.2
11001013.7 21.2
11010013.7 23.2
11011013.7 23.2
... ... ... ... ... 0 13.7 23.2
11111013.7 23.2