mono and pseudo-stereo?

["bluemagpie2003" <>]

Now I use only one Mic for my maranz, so my music file was mono. But 
then  what's the difference if I copy the left channel to right 
channel and make  it as a stereo file? It really occupy a lot of 
memory, but then what's the  difference of hearing btw the mono 
and "pseudo-stereo"?

Thank you!

A beginner, Julie




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