Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

Announcing Bluetooth LE Audio

bluetooth.com

Post reply on HN
Print view View original

51–60 of 108 posts

Re: Announcing Bluetooth LE Audio

#51

Post by Lammy »

rwem wrote: post #23
ShakataGaNai wrote: post #8

The "Broadcast" mode is really an interesting concept - depending on the available range. There are a lot of potential uses for this technology beyond the basic. Of course "I can share my headphones with you" is great, in the day in age of watching moves on iPads in say a plane. However I think in a business setting the broadcasts could be used for all sorts of cool bits. Remember the TV's in airports running news on…

The killer application for this technology is a bicycle bell you can use to break the trance of phone-staring pedestrians who are randomly staggering down the pavement.

A bicycle is a road vehicle. You shouldn’t be riding on the sidewalk.

Re: Announcing Bluetooth LE Audio

#52

Post by hackmiester »

PaulHoule wrote: post #48
PaulHoule wrote: post #35

Earlier quoted context omitted.

See https://blogs.findlaw.com/law_and_life/2013/08/legal-to-ride...

What's with the downvoting? It's astonishing how bicycle riders seem to think everybody except for them is responsible for their safety. Riding on the sidewalk is outright dangerous, I have seen multiple accidents when: * pedestrians got hurt by bicyclists travelling at high speed riding on the sidewalk * bicyclists go around corners and hit pedestrians * bicyclists get hit by cars who couldn't see them at the inters…

Riding on the road is even more dangerous in some areas, though.

If a cyclist and a pedestrian collide, someone might go to the hospital. If a cyclist and a car collide, someone is likely to die, and it's basically always the cyclist.

Re: Announcing Bluetooth LE Audio

#53

Post by klodolph »

unlinked_dll wrote: post #37
klodolph wrote: post #17

Earlier quoted context omitted.

If you are a musician, try introducing a 10ms or 20ms delay and then play something on piano or guitar. Whether you notice it depends on a ton of factors which I’m not going to get into, but in general, at 10ms the music will feel sluggish and you will have difficulty playing on the beat. This can be verified with ABX tests if you like. The timing accuracy for professional musicians can approach 1ms under controlled…

You're not wrong, but I suggest you go out and measure the latency of pro audio wireless systems that have proprietary and specialized low-latency audio codecs. They push 10-15ms, depending on the source content. Often they trade fidelity for latency. They're also rather pricey, because it's a specialized use case. One of the tradeoffs in latency for fidelity is that the two major components of lossy codecs (the filt…

The wireless systems I am thinking have published latency specs of something like 3ms, for example. It’s not worth the cost for my uses so I just stick with wires. I’m not sure which systems you are referring to that have 10ms latency, but I haven’t worked with many wireless systems so it could just be a lack of experience on my part.

https://assets.sennheiser.com/global-downloads/file/12186/SK... - 3ms

https://www.shure.eu/productdocumentsfiles/default/products/... - 4ms

Opus can achieve reasonable lossy compression ratios with 2.5ms packet sizes using its CELT half, which uses MDCT, so it’s definitely possible to achieve high quality under these constraints. I doubt it would make sense with Bluetooth LE because of the complexity of the codec.

Re: Announcing Bluetooth LE Audio

#54

Post by The_rationalist »

lxe wrote: post #29

Where can I find more about LC3 codec? What about LE audio specs? Is this open source or do they sell licenses for this?

Why do we need another codec than opus? Is it complementary?

Also why do Bluetooth create a latency, this is pure nonsense. YouTube has cached the video so instead of sending in real time audio to my headphone, why can't the YouTube app send cached audio too in order to have zero latency?

Re: Announcing Bluetooth LE Audio

#55

Post by emptybits »

Scenario: Two people, quiet room, watching TV, each wearing their own Bluetooth headphones to listen together. As I understand Bluetooth audio standards, until now, this is impossible without additional hardware to split the source and allow multiple 1:1 pairings. Ugh.

Will this seemingly simple scenario be handled by Bluetooth LE Audio? I'm reading about its one-source:multi-sink capability with some hope.

Re: Announcing Bluetooth LE Audio

#56

Post by Lammy »

hackmiester wrote: post #52
PaulHoule wrote: post #48

Earlier quoted context omitted.

What's with the downvoting? It's astonishing how bicycle riders seem to think everybody except for them is responsible for their safety. Riding on the sidewalk is outright dangerous, I have seen multiple accidents when: * pedestrians got hurt by bicyclists travelling at high speed riding on the sidewalk * bicyclists go around corners and hit pedestrians * bicyclists get hit by cars who couldn't see them at the inters…

Riding on the road is even more dangerous in some areas, though. If a cyclist and a pedestrian collide, someone might go to the hospital. If a cyclist and a car collide, someone is likely to die, and it's basically always the cyclist.

That kind of reasoning wouldn’t make me feel better if I were the pedestrian who had to go to the hospital. You make it sound like bicycles are just an inherently bad thing to have around :)

Re: Announcing Bluetooth LE Audio

#57

Post by The_rationalist »

nwah1 wrote: post #10

Is LC3 superior to existing codecs like Opus?

I don't get it, if I watch an opus music on YouTube, will my headphone transmute opus into LC3? Why this indirection and overcompression? Latency shouldn't exist at all with opus anyway, YouTube just has to send cached audio to the headphone.

Re: Announcing Bluetooth LE Audio

#58

Post by [deleted] »

daze42 wrote: post #11
jdietrich wrote: post #6

>LE Audio is Multi-Stream Praise be to the heavens - we can finally have Bluetooth headphones that don't revert to low-bitrate mono if the microphone is active.

YES! This has been bothering me for so long. I'm shocked it's taken them this long to iron it out. I hope the device manufacturers implement it soon. Edit: on second read, I'm not so sure LE Audio will address this issue. "Multi-Stream Audio will enable the transmission of multiple, independent, synchronized audio streams between an audio source device, such as a smartphone, and one or more audio sink devices." This…

[deleted]

Re: Announcing Bluetooth LE Audio

#59

Post by Semaphor »

PaulHoule wrote: post #35
rwem wrote: post #23

Earlier quoted context omitted.

The killer application for this technology is a bicycle bell you can use to break the trance of phone-staring pedestrians who are randomly staggering down the pavement.

See https://blogs.findlaw.com/law_and_life/2013/08/legal-to-ride...

Is this a language problem? Apparently [0] in BE it means sidewalk, but not in AE.

[0]: https://www.merriam-webster.com/dictionary/pavement

Re: Announcing Bluetooth LE Audio

#60

Post by Already__Taken »

Someone1234 wrote: post #46
snarf21 wrote: post #15

Earlier quoted context omitted.

Agreed, plus everyone at the bar can listen to whichever game they want without annoying everyone else. That is killer.

So you go to a bar, don't talk to people, and listen to a specific game solo. Why not just stay at home? The other examples named above make sense, this one seems like a stretch. The whole purpose of going to the bar is to be around other people, the whole point of watching sports at a bar is to enjoy it together.

You could have a speaker on every table without wiring the place all day.
Post reply on HN