Originally Posted by Simbe
Why not use the volume knob instead? xD Doubling the mono signal (doubling the sound energy) is only going to give you a 3dB increase in the sensed loudness. It will not create any sensation of movement on the left--right axis, which is what stereo is all about.
The human ear can locate a sound source based on the time gap that results when the sound of a point source travels to your two ears that are ca. 17 cm apart from each other. The phase of the signal is slightly different between the ears. If you play two same mono signals that are in same phase in two speakers it is just as mono as the same signal played mono all the way, two speakers being the standard mostly everywhere today.
There are "faux stereo" techniques that use ie. comb filtering to divide the signal to two channels, but a good mono recording sounds way better than any artificially created stereo effect.
David Copperfield is not really a sound engineer of any kind...
It's good to hear that I'm not the only one who knows what their talking about here!