From Koh Ming Yao on 2017/02/09 07:21:30 +0000
If we can set the volume for sonar tracking that would be better. Sonar is supported on most devices (probably all) but the automatic volume setting doomed our hope for contactless tracking. That thing made my sleep chart went blank. Hope you accept my idea
Copied from original feature request: http://urbandroid.uservoice.com/forums/264867-sleep-as-android/suggestions/18002596-change-volume-for-sonar