Title: It might be a stupid question due to my lack of knowledge in physics and low-level networks, but I don&#x27;t see how there can be a true feel for a real-time (with imperceptible to the human brain latency) collaboration.<p>I made the following simple calculation - the biggest distance on earth between 2 points would be 1&#x2F;2 * 40000km (the circumference of the Earth on the equator) = 20000km.<p>Lets say these 2 points are connected with an absolutely straight optical fibre. For simplicity&#x27;s sake, there are no penalties for signal amplification and repetition and the speed of the signal is 300000 km&#x2F;s.<p>From these const&#x27;s we get that the latency (in milliseconds) of this signal would be:<p>1000 &#x2F; ( 300000 &#x2F; 20000 ) ~ 67 milliseconds.<p>So, 2 people, 1 in Sydney AS and the other in London UK, will have a theoretical min latency = 1000 &#x2F; ( 300000 &#x2F; 16983 ) ~ 57 milliseconds.<p>While this might seem OK, its far away from it - when a piano player plays on a midi keyboard, the perceptible latency between hitting a key and hearing the sound starts from 10 milliseconds, grows annoying on 20 and for most becomes hard (even impossible) to play from &gt;30 milliseconds.<p>If I was to attempt to design a solution I would probably divide earth&#x27;s area on regions, but still I am not sure what the real distance would be for latency &lt;=10 milliseconds?<p>It will be really interesting to read your thoughts on this topic.
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