3 ms·

150ms is terrible. That's more time than going from London to Los Angeles and back. Bluetooth definitely is the issue with 95% of these latency issues.

the_economist 6y ago
150ms * 2 in many cases, as both parties use a bluetooth headset. Wifi adds another 5-50ms * 2 plus some packet drops.
brokenmachine 6y ago
Oh my god, I had no idea airpods were so bad. Crazy that airpods have that much latency. I have bluetooth in the car and it has way too much latency - I thought Apple had improved it to not be noticeable but I never checked the numbers. Incidentally, for playing midi instruments you generally want things to be below 8ms to feel natural. 150ms is an eternity. Is the lipsync ok if you watch a video on an iphone with airpods?
- kalleboo 6y ago
  > Is the lipsync ok if you watch a video on an iphone with AirPods? For video they compensate for the latency by displaying the visuals slightly delayed (this has been done for over a decade even way back on feature phones). Even game consoles have the option to do this since some TVs/receivers have audio or video latency.
namibj 6y ago
Also, video makes it 10-70 ms worse due to frame-buffering and significantly worse codec latency. If you're within 2-3h by car, try ethernet cables and Mumble/"Jitsii Meet", the former at a low-latency star point (locally, if you have to) and the latter in P2P mode. 30ms end2end is possible, but 50ms end2end is quite realistic if you have good internet routing. Inside a city even 10ms could be possible, but that'd need some ultra-low-latency software, no Coax/DSL (Ethernet-based FTTH should do), and a kinda-exotic low-latency soundcards, because Opus alone eats 5ms one-way in the restricted-celt-only-low-latency mode. This is basically the delay of sharing a round meeting table for ~20 persons.

3 ms·

150ms is terrible. That's more time than going from London to Los Angeles and back. Bluetooth definitely is the issue with 95% of these latency issues.

by martinald 6y ago

the_economist 6y ago
150ms * 2 in many cases, as both parties use a bluetooth headset. Wifi adds another 5-50ms * 2 plus some packet drops.
brokenmachine 6y ago
Oh my god, I had no idea airpods were so bad. Crazy that airpods have that much latency. I have bluetooth in the car and it has way too much latency - I thought Apple had improved it to not be noticeable but I never checked the numbers. Incidentally, for playing midi instruments you generally want things to be below 8ms to feel natural. 150ms is an eternity. Is the lipsync ok if you watch a video on an iphone with airpods?
- kalleboo 6y ago
  > Is the lipsync ok if you watch a video on an iphone with AirPods? For video they compensate for the latency by displaying the visuals slightly delayed (this has been done for over a decade even way back on feature phones). Even game consoles have the option to do this since some TVs/receivers have audio or video latency.
namibj 6y ago
Also, video makes it 10-70 ms worse due to frame-buffering and significantly worse codec latency. If you're within 2-3h by car, try ethernet cables and Mumble/"Jitsii Meet", the former at a low-latency star point (locally, if you have to) and the latter in P2P mode. 30ms end2end is possible, but 50ms end2end is quite realistic if you have good internet routing. Inside a city even 10ms could be possible, but that'd need some ultra-low-latency software, no Coax/DSL (Ethernet-based FTTH should do), and a kinda-exotic low-latency soundcards, because Opus alone eats 5ms one-way in the restricted-celt-only-low-latency mode. This is basically the delay of sharing a round meeting table for ~20 persons.