Wow, love it. CRAZY how the flight path is almost always a wandering S!

Been dreaming of this for years but I think the visual aspect shown in the video has been available for some time with GPS loggers but I haven't seen it with the "box" inscribed in the air, and tones are an interesting idea.

Regarding the tones, would be nice if you'd show a video with the sound of the tones. Are you aware of the LFR navigation systems for aircraft in the 1930's-40's? Wonder if your tones are similar. It seems to me that the important thing would be for the audio information should audibly change with the severity of the deviation (as I'm sure you're aware). If the sound is simply on/off, it would be very hard to smoothly adjust course by reference to the sound. In any case, happy to see new tools emerge!