Android default volume

Default volume frameworks \ base \ media \ Java \ Android \ media \ audiomanager. Java
/** @ Hide default volume index values for audio streams */

 
Public static final int [] default_stream_volume = new int [] {
4, // stream_voice_call
7, // stream_system
4, // stream_ring
8, // stream_music
4, // stream_alarm
4, // stream_notification
7, // stream_rjth_sco
7, // stream_system_enforced
11, // stream_dtmf
11, // stream_tts
4, // stream_fm
4 // stream_matv
};
Maximum Volume frameworks \ base \ media \ Java \ Android \ media \ audioservice. Java
 
Private int [] max_stream_volume = new int [] {
6, // stream_voice_call
7, // stream_system
7, // stream_ring
13, // stream_music
7, // stream_alarm
7, // stream_notification
15, // stream_rjth_sco
7, // stream_system_enforced
15, // stream_dtmf
15, // stream_tts
13, // stream_fm
13 // stream_matv
};