lost audio mid stream while editing

[richiefromboston]

I inadvertantly hit a button while editing and suddenly audio went out its not the mute button and nothing changed volume is fine on all saved videos on PP but I need to "undo" this somehow this is way too much too lose. please help  TY  

[Peru Bob]

Try resetting the preferences:
https://helpx.adobe.com/in/premiere-pro/using/reset-preferences.html

If that doesn't work, try resetting the Workspaces:
Reset a workspace
Reset the current workspace to return to its original, saved layout of panels.
1. Do one of the following:
• Click the Workspace menu icon and select Reset to Saved Layout.
• Choose Window > Workspace > Reset to Saved Layout.
from here:
https://helpx.adobe.com/premiere-pro/using/workspaces.html