Not yet, my Tone Generator does not go below 1Hz; once I hook up my Function Generator, I will test that and let you know. I have tested Magic with success below 1Hz by merging two audio files, one say 100 Hz and one 100.25 Hz The two waveforms come in and out of alignment to create the effect of .25Hz. The issue with that is that the image simultaneously tries to react to the carrier frequencies and the phase cancellation. It would be smoother if Magic just responded to the low frequencies.
Magic will react to any frequency that is in the audio. Since 44.1kHz audio contains every frequency from 0 until 44.1kHz/2 = 22.05kHz, then yes, less than 1Hz will be in there.
I guess I was wondering why you asked before just trying it out .