Every 1.0 stands for ONE Speaker... the .1 is allways the Sub !
So 1.0 is MONO and 2.0 is Stereo !
3.0 is Left, Right and Center. 5.1 are all Speakers and a Sub.
STOP...
Do you have a SONY Receiver ???
b/c here it´s a bit different...
They say 3/2 is 3 front speakers (l, r, c) and two rear (rl, rr)
3/1 is normal surround and 2/0 is stereo...
Please, read you manual ! I can´t explain it all to you...