Ask HN: Video conferencing that works with group singing?

Hello. Could you recommend any video conferencing services that would work with group singing?

I work with two organizations that use video conferencing apps for online classes. During these online classes, the participants sing together (10-20 people). The problem we're having is that the voices are out of sync. I assume this is because of the different latency participants have with the server.

We have tried zoom.us, webex, hangouts, skype-- same problem across all apps (out of sync singing).

I don't know enough about video conferencing technology to know what to look for in terms of features. Perhaps a service that lets me adjust the latency of each participant manually? Or a service that dynamically adjusts for latency in a way that makes in-sync group singing possible?

Any help the HN community could provide is much appreciated!

Unfortunately that will be really tough. I have a live audio background and the recommendation I have always heard is to keep the latency of your signal path at the 1 ms level when dealing with monitoring applications. That's a solid order of magnitude below what is common for VOIP let alone video. You could maybe get away with audio only, but round trip latency is still getting up there.

Edit: I know of some pro-grade point to point audio solutions that are able to handle this problem, but I'm unsure if there's anything consumer ready.

> keep the latency of your signal path at the 1 ms level

NYC->LA at the speed of light in a vacuum

4000 km / c = 13 ms

Slower in fiber; apparently about 19 ms.

you really need to be The best solution is JamKazam https://www.jamkazam.com/ (I have no affiliation and have not used the product in years)

You'll each need a good interface and Ethernet connections. A good interface on windows would typically have an ASIO driver. This is not an easy thing for more then a few people. Note: Jamkazam also makes an all-in-one device (JAMBLASTER).

One way is achieving low latency, which is technically super hard, as others point out. Keep in mind that another way is selecting less latency sensitive music, "slower" music with longer held tones. But that's a style change.