Tracks "muted"?

I’m new to the program, im using Cubase 5 and just added a guitar track and drum track, i finished editing the drums when i wanted to add symbal, i pressed something with the instruments and now i cant hear the drums. I see the audio go up and down as the drums hit, but no sound… Almost the same thing happened when i enabled “tick”, the audio for the guitar was gone, even though i could see sound levels go up and down. All inputs and outputs are correct. Same with VST audio setup, i can hear guitar but not drums.

I think we’ve all done that! press play and c which should give you a metronome beat can you hear that? If not then your audio interface settings could be the problem. if you can hear the metronome then you may have muted the track search for mute in your documentation, I hope that helps!