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LDAC (sh.itjust.works)
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[-] Agent641@lemmy.world 201 points 6 days ago

It's loss-less, not loss-none

[-] FabledAepitaph@lemmy.world 40 points 5 days ago

Dang it, was going to make this same joke lol

[-] grrgyle@slrpnk.net 8 points 5 days ago

It's a good joke

[-] 9point6@lemmy.world 153 points 6 days ago

We really need someone other than Qualcomm & Apple to come up with lossless Bluetooth audio codecs.

TBF the whole Bluetooth audio situation is a complete mess

[-] Natanael@slrpnk.net 66 points 6 days ago

Opus! It's a merge of a codec designed for speech (from Skype!) with one designed for high quality audio by Xiph (same people who made OGG/Vorbis).

Although it needs some more work on latency, it prefers to work on bigger frames but default than Bluetooth packets likes, but I've seen there's work on standardizing a version that fits Bluetooth. Google even has it implemented now on Pixel devices.

Fully free codec!

[-] WolfLink@sh.itjust.works 13 points 6 days ago
[-] Natanael@slrpnk.net 28 points 5 days ago* (last edited 4 days ago)

Nobody needs lossless over Bluetooth

Edit: plenty of downvotes by people who have never listened to ABX tests with high quality lossy compare versus lossless

At high bitrate lossy you literally can't distinguish it. There's math to prove it;

https://en.wikipedia.org/wiki/Nyquist%E2%80%93Shannon_sampling_theorem

At 44 kHz 16 bit with over 192 Kbps with good encoders your ear literally can't physically discern the difference

[-] undefined@lemmy.hogru.ch 11 points 5 days ago

The minute lossless becomes available wirelessly I’ll ditch my ridiculous headphone cable.

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[-] KairuByte@lemmy.dbzer0.com 39 points 6 days ago

Bluetooth as a whole is kind of a mess if we’re being honest.

[-] cmnybo@discuss.tchncs.de 21 points 5 days ago

That's what happens when you have a 25 year old protocol and try to maintain backwards compatibility through all of the versions.

[-] tabularasa@lemmy.ca 11 points 5 days ago

Can we name a more poorly implemented protocol? Probably. One used as much as Bluetooth? Probably not.

[-] Natanael@slrpnk.net 12 points 5 days ago
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[-] legion02@lemmy.world 24 points 6 days ago
[-] ramble81@lemm.ee 13 points 6 days ago

Correct. Qualcomm makes aptX

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[-] BlackEco@lemmy.blackeco.com 21 points 6 days ago

Wait, did Apple implement its own codec? I thought even the Airpods Max used AAC, which is lossy.

As for Qualcomm, only aptX Lossless is lossless and I'm not aware of many products supporting it (most supports aptX HD at most)

[-] cogman@lemmy.world 26 points 6 days ago

Yeah, the problem (imo) isn't lossy v lossless. It's that the supported codecs are part of the Bluetooth standard and they were developed in like the 90s.

There are far better codecs out there and we can't use them without incompatible extensions on Bluetooth.

[-] Natanael@slrpnk.net 16 points 6 days ago

There's a push for Opus now, it's the perfect codec for Bluetooth because it's a singular codec that fits the whole spectrum from low bandwidth speech to high quality audio, and it's fully free

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[-] uis@lemm.ee 15 points 4 days ago

Many lossless codecs are lossy codecs + residual encoders. For example FLAC has predictor(lossy codec) + residual.

[-] palordrolap@fedia.io 72 points 6 days ago

Ah, misleading use of terminology that indicates one thing, but will win in court even if it actually means, or can later be said to mean, another.

I hope those involved in helping companies win these lawsuits choke on bones from food sold as boneless. Because that won a court case after "boneless" was redefined as a cooking method.

I don't want them to choke to death. Just a little lesson, you know?

[-] forrgott@lemm.ee 27 points 6 days ago* (last edited 6 days ago)

I vote they choke indefinitely. But not to death; I want them to die of old age, spending decade upon decade choking endlessly.

[-] CosmicTurtle0@lemmy.dbzer0.com 13 points 6 days ago

I remember when unlimited minutes plans for cell phones meant 300 minutes.

Or when Comcast had unlimited downloads which was capped at 2 TB.

These shitty companies know exactly what they are doing.

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[-] circuitfarmer@lemmy.sdf.org 42 points 6 days ago

As unfortunate as the naming misdirection is, I have to say: LDAC sounds significantly better (to me) than other Bluetooth codecs I have tried. It also works on Linux and android with no issues whatsoever. Open source is good.

I use it with a pair of Sony XM5's, which can also be used in wired mode, so you kind of get the best of both worlds.

[-] sus@programming.dev 23 points 5 days ago* (last edited 5 days ago)

at high signal strength LDAC should default to 990kbps.. which is kind of ridiculous since it's so high it's higher than some lossless codecs, like uncompressed 16-bit 48kHz. (which is higher than standard CD quality)

[-] cmnybo@discuss.tchncs.de 24 points 5 days ago

Uncompressed 16 bit 48KHz stereo is 1536 kbps, which is just slightly higher than what bluetooth 5 is capable of.

[-] sus@programming.dev 21 points 5 days ago

Oh I forgot about stereo, ha.

[-] circuitfarmer@lemmy.sdf.org 10 points 5 days ago* (last edited 5 days ago)

The bitrate is manually enforceable on Linux, too

*specifically using PipeWire

[-] ProgrammingSocks@pawb.social 7 points 5 days ago

Pipewire or the pulseaduo Bluetooth codec add-on. The pipewire implementation seems to be mimicking the old pulseaudio plugin.

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[-] reminiscensdeus@lemm.ee 40 points 6 days ago

Does this meme format / cat have a name? I was trying to find the raw version the other day and could not.

[-] sjmarf@sh.itjust.works 58 points 6 days ago
[-] Ironfacebuster@lemmy.world 11 points 5 days ago

> knowyourmeme link

> look inside

> cat

[-] reminiscensdeus@lemm.ee 10 points 6 days ago
[-] frankenswine@lemmy.world 19 points 6 days ago
[-] shifty@leminal.space 20 points 6 days ago

"On 17 September 2019, the Japan Audio Society (JAS) certified LDAC with their Hi-Res Audio Wireless certification."

Something something oxymoron. Bluetooth is trash, its why I still use wired whenever I can.

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[-] ElectroLisa 16 points 6 days ago

To my knowledge it's lossless in CD quality only, in high-res modes it becomes lossy

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[-] fouloleron@lemmy.world 11 points 6 days ago

Ignorant of the subject matter, but I ripped a bunch of CDs to FLAC some time ago. Would that not work for this purpose?

[-] kipo@lemm.ee 21 points 6 days ago

The Sound Guys do a good job of breaking down LDAC, however the main point of criticism I have about the article is that they say that LDAC isn't great because most smartphones don't auto-choose the highest 990 bitrate. That doesn't seem like an LDAC problem, that seems like a phone problem. My phone is admittedly a Sony, but it always chooses the highest bitrate first. There's even a setting to force it to use 990.

The other criticism I have is that the sound guys kind of overlook the fact that, when your phone is in your pocket, it's close enough to the headphones that you'll almost always get the 990 bitrate. And the sound quality at 990 is fantastic. I cannot tell a difference between it and a wired connection for CD-quality FLACs. Even the 660 stepdown bitrate of the LDAC codec is really good.

[-] fl42v@lemmy.ml 13 points 6 days ago

Ldac is a Bluetooth thingy, so my understanding is that flacs will be re-encoded on the fly when you play 'em on bt headphones with ldac.

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this post was submitted on 24 Jan 2025
795 points (100.0% liked)

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