Back in July, I happened upon this very interesting article:
https://urldefense.proofpoint.com/v2/url?u=https-3A__www.npr.org_2020_07_14_891091995_playing-2Dmusic-2Dtogether-2Donline-2Dis-2Dnot-2Das-2Dsimple-2Das-2Dit-2Dseems&d=DwID-g&c=gRgGjJ3BkIsb5y6s49QqsA&r=gd8BzeSQcySVxr0gDWSEbN-P-pgDXkdyCtaMqdCgPPdW1cyL5RIpaIYrCn8C5x2A&m=zpL0oT1cbXhkmhUnAgAlP_2xZXA8HGVTmSB2t3YMzm0&s=5JEaO7QOxz0BqQlR9GlqRwbwiLfa0BQ0BQbfjxtn-no&e=
The mechanism involves JackTrip (https://urldefense.proofpoint.com/v2/url?u=https-3A__ccrma.stanford.edu_software_jacktrip_&d=DwID-g&c=gRgGjJ3BkIsb5y6s49QqsA&r=gd8BzeSQcySVxr0gDWSEbN-P-pgDXkdyCtaMqdCgPPdW1cyL5RIpaIYrCn8C5x2A&m=zpL0oT1cbXhkmhUnAgAlP_2xZXA8HGVTmSB2t3YMzm0&s=B9YJRtL8KTEpENDPfHQDURVY_rTqVRE63Y9qLAZ06OI&e= )
and the Jack Audio Connection Kit (https://urldefense.proofpoint.com/v2/url?u=https-3A__jackaudio.org_&d=DwID-g&c=gRgGjJ3BkIsb5y6s49QqsA&r=gd8BzeSQcySVxr0gDWSEbN-P-pgDXkdyCtaMqdCgPPdW1cyL5RIpaIYrCn8C5x2A&m=zpL0oT1cbXhkmhUnAgAlP_2xZXA8HGVTmSB2t3YMzm0&s=oc-E0raMEJksSn5cDufwqbmm_YwN2niTaNohBVZQBPs&e= ).
30 milliseconds (or ~30 feet apart) is the optimal latency for musicians
to play together and hear and feed off each other in real time.
The above packages seem to solve the distance-apart music playing problem,
up to a point and within a certain radius.
It's still constrained by the light speed limit...
- Larry
Steven C Timm wrote on 12/23/20 8:41 AM:
> In theory light could go 5000 km in 16ms. In practice it takes 105ms to get
> packets from FNAL to CERN.
> (speed of light is slower in fiber, fiber doesn't go straight, there are several
> switches).
> Even 16ms is more of a delay than you want in a musical performance. And you
> have to do the round trip.
> Try singing together with someone on zoom if you want to prove the point. The
> high-speed network doesn't give much benefit over the regular internet in terms
> of latency. it improves bandwidth but not latency all that much. The only way
> all these virtual choirs work is that they send out a base track to everyone
> that the people have locally and then each person records their part on top of it.
>
> Steve Timm
> (Physicist and amateur church musician, computing and recording remotely for
> last 10 months)
>
>
> --------------------------------------------------------------------------------
> *From:* [log in to unmask]
> <[log in to unmask]> on behalf of Keith Lofstrom
> <[log in to unmask]>
> *Sent:* Tuesday, December 22, 2020 6:24 PM
> *To:* scientific-linux-users <[log in to unmask]>
> *Subject:* Way Off Topic - HEP Network Symphony Orchestra
> This isn't Scientific Linux, though SL and the team that
> supports it would be involved in implementation.
>
> ----
>
> AFAIK, we are still in the middle of Long Shutdown 2,
> with the Large Hadron Collider /not/ sending terabytes
> of experimental data through the dedicated HEP network.
>
> Meanwhile, gathering musicians on stage for a symphony
> orchestra is a big health risk during the COVID pandemic.
>
> The speed of sound across a symphony stage is 500,000 times
> slower than bits on an optical fiber. In theory, musicians
> could be connected through the HEP network, spread out over
> 5000 kilometer distances compared to the 10 meter distance
> across a symphony stage. Distances are smaller than that
> between groups of European or North American cities.
>
> There are probably more symphony fans than high energy
> physics fans (many physicists are both), so using the HEP
> network for concerts during the COVID crisis could earn
> a LOT of political capital, and help with future funding,
> including funding for the next upgraded HEP network.
>
> It would also develop new techniques for synchronizing
> planet-scale sensor networks. There are likely some
> excellent astronomical and geophysical uses for that.
>
> I'd guess that readers of this list know the people who
> know the people who know how to do this. What could we
> slap together in a hurry?
>
> Keith
>
> --
> Keith Lofstrom [log in to unmask]
--
P. Larry Nelson (217-693-7418) | IT Administrator Emeritus
810 Ventura Rd. | High Energy Physics Group
Champaign, IL 61820 | Physics Dept., Univ. of Ill.
MailTo: [log in to unmask] | https://urldefense.proofpoint.com/v2/url?u=http-3A__hep.physics.illinois.edu_home_lnelson_&d=DwID-g&c=gRgGjJ3BkIsb5y6s49QqsA&r=gd8BzeSQcySVxr0gDWSEbN-P-pgDXkdyCtaMqdCgPPdW1cyL5RIpaIYrCn8C5x2A&m=zpL0oT1cbXhkmhUnAgAlP_2xZXA8HGVTmSB2t3YMzm0&s=fj9g2_VlJrx9lMvl-kPUX35iD9Mze5o5kI2-xJhJ78c&e=
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