MAS3549F datasheet(49/92 Pages) MICRONAS

Il numero della parte	MAS3549F

Spiegazioni elettronici	MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec

PDF	92 Pages

Scroll/Zoom	100%

Produttore elettronici	MICRONAS [Micronas]

Homepage	http://www.micronas.com

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DATA SHEET

MAS 35x9F

Micronas

June 30, 2004; 6251-505-1DS

00 1E

Loudness

bit[15:8]

Loudness Gain

44hex

+17 dB

40hex

+16 dB

...

04hex

+1dB

00hex

0dB

bit[7:0]

Loudness Mode

00hex

normal (constant volume at 1 kHz)

04hex

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

keeping the amplitude of the 1-kHz reference frequency constant. The

intended loudness 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 conjunction with volume, would result in an overall positive gain.

The settings should be: max (bass, treble) + loudness + volume

≤ 0dB

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

volume is shifted from 1 kHz to 2 kHz.

LDNESS

Table 3–16: Codec control registers on I2C subaddress 6C

hex, continued

Address

(hex)

Function

Name

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