How to simulate a stereo recording? I have a single channel audio recording. I want to simulate the stereo recording when it is (hypothetically) played on a speaker in front of stereo mics (distance between them - say 10 cm). 

Are there any tools which can do this?

Edit- I am looking for something more precise - as in for specific distance between speaker and mics and also for given room dimensions. I tried Audacity 'Reverb tool' which sort of does stereofication but there is no way to specify certain distances (speaker-mic, mic-mic etc.)
Check a music production software (commercial: Logic/ Ableton/ Pro Tools. Open Source: Ardour, Mu Lab) or otherwise audacity. Add a stereo widening tool plugin.
For that check KVR Audio
stereo/ imaging/ widening
stereo imaging more close search