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Protocol Frame Description
5-46 AT83SND2CMP3 User Guide
7525A–MP3–07/05
Table 5-53 . AUDIO_SET_GAIN parameter
Note: All audio gain value are described in AT83SND2CMP3 datasheet. Refer to register
description for more details.
Player response to AUDIO_SET_GAIN is SYSTEM_ACK.
DAC Master Gain parameter can also be updated with :
SYSTEM_VOLUME_UP command,
SYSTEM_VOLUME_DOWN command.
Note: Player response to SYSTEM_VOLUME_UP or SYSTEM_VOLUME_DOWN command is
PLAYER_VOLUME* Response. DAC Master Gain is Byte 5 in PLAYER_VOLUME*
response.
Gain Selector Gain Value
Corresponding Register in
datasheet
Line Out Gain
00h
00000000b => 0 dB
...
00000010b => -3 dB
...
00100000b => mute
LLOG, RLOG
Power Amplifier Gain
01h
00000000b => -22 dB
00000001b => + 20 dB
...
00001000b => -1 dB
00001011b => -10 dB
...
00001111b => -22 dB
APAGAIN
Line In Gain
02h
00000000b => +20 dB
...
00000101b => 0 dB
...
00001100b => -3 dB
...
00010001b => mute
RLIG, LLIG
Aux In Gain
03h
00000000b => +20 dB
...
00000101b => 0 dB
...
00001100b => -3 dB
...
00010001b => mute
AUXG
DAC Master Gain
04h
00000000b => +12 dB
...
00001000b => 0 dB
...
00001010b => -3 dB
...
00100000b => mute
RMPG, LMPG