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:* [email protected]
<[email protected]> on behalf of Keith Lofstrom
<[email protected]>
*Sent:* Tuesday, December 22, 2020 6:24 PM
*To:* scientific-linux-users <[email protected]>
*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 [email protected]
--
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: [email protected] | 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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"Information without accountability is just noise." - P.L. Nelson, 04/06/2001
