Tested with Pro 14 & 15… I will play certain songs and playback is fine… However on other songs I don’t hear anything??? My Studio → Audio Connections for Inputs & Outputs is the same … Yet there is no visible (see attached) or audio sound on the Stereo Output track. Control Room is not connected…
Any ideas? Thx in advance.
Check that tracks and buses are actually routred to the stereo out - bypass inserts on the master - if that doesn’t work, completely remove all inserts on the master.
Could try checking if any of the inserts on the master bus are muting the audio. Next check your OS is routing audio correctly & check not only just My Studio → Audio Connections, but Studio > Studio Setup and check the Audio system tab on the left and anything under it. Do double check My Studio → Audio Connections though. I just opened a new project and it wasn’t selected, even though ive made no changes. & check track routing to stereo bus.
I had this issue not long ago but cant completely remember what I did to solve it as I was doing a lot at the time & going through a load of issues with Cubase at the moment 
I guess SIR3 is the culprit. It would not pass audio if the used impulse response cannot load for whatever reason.
Thank you all for your suggestions… Grim… you led me to the solution… I have a VST that was on the Output bus but not active… FUEL… I must have been trying it out… As soon as I removed it from the Output bus I could hear everything again.., Removed the .DLL and everything is working properly again… Much appreciated . 
