7 ms·

Bluetooth. Stop using it. Without even looking at your setup, I would bet $100 minimum that it's Bluetooth latency. It adds a lot of latency, 500ms is not unu

by bdamm 6y ago

Bluetooth. Stop using it. Without even looking at your setup, I would bet $100 minimum that it's Bluetooth latency. It adds a lot of latency, 500ms is not unusual, and many folks have no idea that all that latency is really just the last 18 inches. This is why you're seeing more and more cases where people are using good old iPhone wired earphone for conference calling, especially when skyping a TV interview.

CharlesW 6y ago
> It adds a lot of latency, 500ms is not unusual… How are you measuring? Half that is considered high-end from what I'm reading[1], and AirPods Pro apparently reduce that to 150ms. [1] https://stephencoyle.net/airpods-pro https://stephencoyle.net/airpods-pro
- martinald 6y ago
  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.
- closeparen 6y ago
  Shure PGX-D is a prosumer / church-basement level of digital wireless microphone system, and that's 3.5ms.
- deleted 6y ago
  [deleted]
avianlyric 6y ago
I wish it was that simple. Unfortunately I was seeing this then using the laptops built in speakers, not just with Bluetooth headphones.

by bdamm 6y ago

CharlesW 6y ago

> It adds a lot of latency, 500ms is not unusual… How are you measuring? Half that is considered high-end from what I'm reading[1], and AirPods Pro apparently reduce that to 150ms. [1] https://stephencoyle.net/airpods-pro https://stephencoyle.net/airpods-pro

martinald 6y ago
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.
closeparen 6y ago
Shure PGX-D is a prosumer / church-basement level of digital wireless microphone system, and that's 3.5ms.
deleted 6y ago
[deleted]

avianlyric 6y ago

I wish it was that simple. Unfortunately I was seeing this then using the laptops built in speakers, not just with Bluetooth headphones.