"Dead Simple : Feed any mono sound into falseFI and you'll get a stereo sound out. well ... sort of ...
falseFI's tweakable feed-forward comb-filter splits the incoming audio into varying width frequency bands which are then panned left and right creating a false sense of stereo. As the filter's offset time is changes, so the width (and therefore position) of the frequency bands is changed.
Featuring 2 main modes, 'old-skool' and 'fresh' tone settings, and a little m/s processing falseFI will have your mono tracks positively jumping out of your speakers in no time ... "
price : £10
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Source via Music Informatory