Hey guys, like the title says I wonder how you fade in and out music, lets say menu music with libgdx. Do you use tweening for that? 
Best regards.
I haven’t actually used sound in libgdx, but I have in Java. I believe in libgdx you would create a Music, which you can set the volume of, using music.setVolume(float). Then you can tween the volume.
Yeah, you can set audio volume in libGdx as well, you just do musicName.setVolume(0.0f - 1.0f)
As the above comments, you can set volume, but not pitch unfortunately.