StereoLoco

Concept: The app is an audio effect which makes a monaural audio signal "stereophonic".

Usage: Just insert this plugin in AUv3 host and effect your audio source. There are 2 sliders, one of which ("buffer size") determines incoming audio sample size 2^N (default N = 11), the other ("stereonize") adjusts stereo image (from -500 to 500. Double-click will return 0).

The standalone supports IAA, so you can use this app together with a popular app "AudioShare".

System Requirements : 

stereo output: plug a headphone/mic or some audio interface.

AUv3 host: the app also works as AUv3 plugin.