Dark green muted tracks not playing why?

So when you mute tracks on and off you they will go green or not etc…
Now I have managed to get one sound to turn green, but less so, than the other sounds.
The ones that make sound are bright green, the one that does not make any sound is darker green.

What does it mean? This type of green?
Why can’t I hear anything?

Dimly green pads in mute mode indicate song mutes which can be entered in a single pattern, chains, and songs. They allow for automated muting in chains/songs and muting quantized to the next pattern cycle of a single pattern.

Hold down chain or song button and pads should all be yellow, ones that aren’t have a song mute so press them to remove the mute and they’ll turn yellow…