the bypass mode of the volume block defaults to mute, so if you bypass the block, you won't hear anything. if you disconnect a modifier, the parameter stays where it is, so if it's on zero (which is the default value for external 1) then it will stay there and you still won't hear any sound.
how to resolve:
1) turn the default value of externals 1 and 2 to 100% in the I/O ctrl pages
2) remove the volume and whammy blocks and replace with shunts
3) remove the links between the externals and the parameters they're linked to and set the parameters to max value
i'm so fed up with explaining this to people. i try to provide patches with some interesting functionality, but every time i include an external controller, i get people complaining that they get no sound, or it doesn't work for some reason. i need to find a solution to this, because it's kinda driving me crazy.