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Comment by exabrial

Laugh, but this probably does have some real world applications for Live Audio.

Digital Live audio mixing is taking over, but it suffers one flaw compared to analog: Latency. Humans can adjust pretty easily to performing an action and hearing a delayed response (that's pretty natural in our daily lives, basically think of it as echolocation). This is sort of like standing farther from a guitar amplifier (sound travels roughly 1 ms per foot). However, singers have it the worst: there is 0 latency from their voice to the ear canal, so monitor systems try to use analog as much as possible.

For digital audio links, every time you join then end-to-end or decode them, you get a bit of latency added.

There are a few audio interconnects that run on Ethernet's OSI Layer 0 (physical medium)

* AES50 is standardized, basically you can think of it as the 100Base-T of digital live audio. It's synchronously clocked with a predictable latency; with roughly ~62us per link. Pretty nice. Cat5e cables are dirt cheap and musicians are destructive as feral cats, so it it's a pretty good solution. Max length is 100meters.

* AudioDante is also popular but actually relies on IP Layer 3, so latency is variable. Typical values are 1ms - 10ms. Max length is pretty much unlimited, with a lot of asterisks.

FTA: 11us is _unbelievably good_ digital latency, but with near unlimited length is actually a pretty good value proposition for Live Audio. There may be a niche demand for a product like this: slap in some SFP adapters, transmit a channel of digital audio over whatever medium you like.

parent exabrial 1 year ago

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