04-04-2020, 01:29 AM
(This post was last modified: 05-17-2020, 09:11 PM by Hans Peter Augustesen.)
TOTAL LATENCY, about
We begin with some serious fun - for people hit by latency
LATENCY demonstration in SESSION - by distinct clapping, tapping on microphone or whatever. 60-70 bpm:
1. One person start - and keep on, steady.
After some seconds all other try to follow excactly. One by one, maybe. Whatever.
2. One person start ...
Only one other person follow ...
-
JamKazam terms:
20 milliseconds and below is called GOOD and the dot is GREEN
Between 20 and 35 is called FAIR and the dot is YELLOW
Between 35 and 50 is called POOR and the dot is RED
50 and over is called UNACCEPTABLE and the dot is RED
-
10 milliseconds TOTAL LATENCY between (two) people is like playing 3,5 meters apart from each other. Very few people can hear/notice such low latency as 10 ms.
20 milliseconds is like 7 meter apart. All average human beings can hear/notice 20 milliseconds delay - under best condition.
50 milliseconds is like 17,5 meter apart.
100 milliseconds is like 35 meter apart.
-
Playing together in "real" real time is impossible
There will always be some latency, delay - from audio interface and from the internet connection.
Audio interface latency can be as low as 2 milliseconds - depending on quality and so.
Internet latency can be as low as 3 milliseconds, depending on quality - and distance between people, quantity, so to speak.
--- VERY important is the so called PING - the "answer time" from PC to internet provider and back,
I have 13 ms PING, for example. It can be so low as 2 ms.
Example: 2 x audio interface = 4 milliseconds.
1 x internet connection = 3 milliseconds
TOTAL LATENCY = 7 milliseconds
-
The best connection I have is from one of my computers to another of my computers on the same router/LAN. Two accounts is needed for that, of course. The TOTAL LATENCY is around 10 milliseconds.
My second best connection is with a person 100 kilometers away. The TOTAL LATENCY is 18 milliseconds.
To people in Australia (I am in Denmark) the TOTAL LATENCY is 200-300 milliseconds - that is only for very, very, very slowly and loose singing.
To USAs eastcoast it is usually 75-80.
To Californien 110-130
Thailand around 150.
My relatively best connection is with one 2.000 kilometer away in Norway. The TOTAL LATENCY is about 27 milliseconds.
Latency in my audio interface is by the way 4.2 milliseconds.
-
Having the same internetprovider gives usually lower internet latency.
Maybe 5 milliseconds in most cases.
Maybe 20 in some cases.
What is the usual internet latency between for example?
1. Portland, New Hampsh i re and New York
2. Kansas City and Denver
3. Seattle and Chicago
4. San Antonio and Panama City
4. Dallas and Los Angeles
6. Jacksonville and Miami
7. New York to Kansas = 32 ms - as one example. audio gear included
Other examples is very welcome
- from all over the world
Not audio interface latency included, please
- only internet latency
We begin with some serious fun - for people hit by latency
LATENCY demonstration in SESSION - by distinct clapping, tapping on microphone or whatever. 60-70 bpm:
1. One person start - and keep on, steady.
After some seconds all other try to follow excactly. One by one, maybe. Whatever.
2. One person start ...
Only one other person follow ...
-
JamKazam terms:
20 milliseconds and below is called GOOD and the dot is GREEN
Between 20 and 35 is called FAIR and the dot is YELLOW
Between 35 and 50 is called POOR and the dot is RED
50 and over is called UNACCEPTABLE and the dot is RED
-
10 milliseconds TOTAL LATENCY between (two) people is like playing 3,5 meters apart from each other. Very few people can hear/notice such low latency as 10 ms.
20 milliseconds is like 7 meter apart. All average human beings can hear/notice 20 milliseconds delay - under best condition.
50 milliseconds is like 17,5 meter apart.
100 milliseconds is like 35 meter apart.
-
Playing together in "real" real time is impossible
There will always be some latency, delay - from audio interface and from the internet connection.
Audio interface latency can be as low as 2 milliseconds - depending on quality and so.
Internet latency can be as low as 3 milliseconds, depending on quality - and distance between people, quantity, so to speak.
--- VERY important is the so called PING - the "answer time" from PC to internet provider and back,
I have 13 ms PING, for example. It can be so low as 2 ms.
Example: 2 x audio interface = 4 milliseconds.
1 x internet connection = 3 milliseconds
TOTAL LATENCY = 7 milliseconds
-
The best connection I have is from one of my computers to another of my computers on the same router/LAN. Two accounts is needed for that, of course. The TOTAL LATENCY is around 10 milliseconds.
My second best connection is with a person 100 kilometers away. The TOTAL LATENCY is 18 milliseconds.
To people in Australia (I am in Denmark) the TOTAL LATENCY is 200-300 milliseconds - that is only for very, very, very slowly and loose singing.
To USAs eastcoast it is usually 75-80.
To Californien 110-130
Thailand around 150.
My relatively best connection is with one 2.000 kilometer away in Norway. The TOTAL LATENCY is about 27 milliseconds.
Latency in my audio interface is by the way 4.2 milliseconds.
-
Having the same internetprovider gives usually lower internet latency.
Maybe 5 milliseconds in most cases.
Maybe 20 in some cases.
What is the usual internet latency between for example?
1. Portland, New Hampsh i re and New York
2. Kansas City and Denver
3. Seattle and Chicago
4. San Antonio and Panama City
4. Dallas and Los Angeles
6. Jacksonville and Miami
7. New York to Kansas = 32 ms - as one example. audio gear included
Other examples is very welcome
- from all over the world
Not audio interface latency included, please
- only internet latency