Thank you for your explanation of the workings of your software. I have been studying binaural isochronic and monaural beat stimulation technologies for a long time now; before pcs had the sound hardware and audio editing tools to create these effects. I even designed and built a hardware binaural beat generator, more than twenty years ago, that enabled me to experiment with binaurals, and convinced me that the effects of these stimuli are more than just placebo, which is the current view of the scientific community.
Your concept of a shaped modulating pulse is new to me, because all the literature I have read seems to conclude that the effectiveness of isochronic pulses is due to the sharp attack and decay period of the pulse. There are even some purists who insist on square waves as the carrier, even though personally square wave isochronics sound like a door bell or an alarm, and I have never liked them. Sine wave pulses sound much better, and are more pleasing to the ear. I once drew up a schematic for a hardware isocronic sine wave generator, which would have used pulses generated by a 555 timer, and a single transistor gated sine wave oscillator, but then I realized that such a project would be very old school, and it would be much better to to do it in software.
I am not a programmer, so I have not been able to create such an application myself. But I am glad that I have found such an application; sine isochronic not only will allow me to get back into experimentation with isochronic tones, but also will teach me a lot of new things.Again, thank you for making your work free and open source, and replying so promptly to my queries.