>>549
自分でビルド出来るなら、下記コメントが参考になる。

Camera shutter sound policy.
config_camera_sound_forced configuration option in config.xml defines if the camera shutter sound is forced (sound even if the device is in silent mode) or not.
This option is false by default and can be overridden by country specific overlay in values-mccXXX/config.xml.