Bipolar NPN transistors - current flow?

[MadMike]

On almost every NPN transistor based amplification/distortion schematic I've seen, they used the 'Linear Common Emitter' layout. So basically the audio in wired to the base, the voltage is wired to the collector and the emitter goes to ground. My question is, if the main terminal signal current flows from the collector to the emitter, why is the audio out connected to the collector?

What voodoo is happening here? I can't wrap my brain around what's happening... Is the audio signal going against the current?

Thanks,
Mike

[bsoncini]

https://www.electronics-tutorials.ws/transistor/tran_1.html

Check out the common emitter part

Then this. https://www.electronics-tutorials.ws/transistor/tran_2.html