Specifications

14
AT83SND2CMP3
7524D–MP3–07/07
Audio Controls
Volume Control The MP3 decoder implements volume control on both right and left channels. The
MP3VOR and MP3VOL registers allow a 32-step volume control according to Table 15.
Table 15. Volume Control
Equalization Control Sound can be adjusted using a 3-band equalizer: a bass band under 750 Hz, a medium
band from 750 Hz to 3300 Hz and a treble band over 3300 Hz. The MP3BAS, MP3MED,
and MP3TRE registers allow a 32-step gain control in each band according to Table 16.
Table 16. Bass, Medium, Treble Control
VOL4:0 or VOR4:0 Volume Gain (dB)
00000 Mute
00001 -33
00010 -27
11110 -1.5
11111 0
BAS4:0 or MED4:0 or TRE4:0 Gain (dB)
00000 - ∞
00001 -14
00010 -10
11110 +1
11111 +1.5