Separated Ringtone and SMS

Feb 5, 2019
Can you add option to regulate calling ringtone and sms with different volume?
That isn't possible, but you can use custom sounds with different values of loudness. This technique is called ReplayGain.

Use the tool MP3Gain for .mp3 files and VorbisGain for .ogg files to set up internal loudness of your custom notification sound files. That doesn't change sound quality and can be make undone.