TCP/IP Speakers 316
Fallen Kell writes "From the anouncement, "Polk Audio LCi-IP Ultra High Performance In-Wall/ In-Ceiling Loudspeakers are the world's first active Internet Protocol-ready Loudspeakers. They were created for IP networked systems such as the ground-breaking NetStreams DigiLinx system but also provide vast convenience and performance benefits when used in analog systems. Integrated digital amplifiers eliminate remote amplifiers connected via hundreds of feet of lossy, performance-robbing speaker wires." I had the great pleasure of having a demo on September 16th, 2005 of these speakers. The ability of connect to a wired network for sending the audio stream is simply amazing and wonderful innovation in the audio world."
Audiophile pish (Score:5, Funny)
Speaker Hacking (Score:4, Interesting)
Re:Speaker Hacking (Score:5, Funny)
In other words . . . (Score:3, Funny)
Hmm. Those bloody students downstairs playing their loud music at all hours... on YOUR stereo.
All your bass are belong to us
Sorry, I couldn't help myself.
Re:Speaker Hacking (Score:2, Funny)
Re:Audiophile pish (Score:5, Funny)
I'll also be offering my own propriatary technology which filters the datastream to make sure the 1s are all inline with the direction of travel. 1s going through crosswise is the leading cause of signal degradation.
Rigourous highly subjective tests (remember, in Audio World objectivity is a Bad Thing) in my own lab allow me to say that I can say the improvement in all sorts of silly word parameters is astounding. Oh, and "Quantum Flux!"
You can't leave out Quantum Flux Technology if you wish to be taken at all seriously. This High Tech Deep Juju(tm) after all.
I'm working on a series of Internet Ready acoustic treatments for your listening room too, stay tuned to this channel. Oh sure, you thought Digital Ready should cover it. Silly boy. How would I be able to afford a villa in the Cayman Islands if that were the case?
KFG
Re:Audiophile pish (Score:3, Funny)
Re:Audiophile pish (Score:2)
Re:Audiophile pish (Score:3, Interesting)
Re:Audiophile pish (Score:3, Funny)
The vinylphiles may have point there. I wouldn't any Gibbs on my equipment either. Be it Andy, Barry, Maurice, or Robin, I don't wan't it going through my speakers. 100% Pure Evil.
Re:Audiophile pish (Score:5, Funny)
Re:Audiophile pish (Score:2, Funny)
Re:Audiophile pish (Score:5, Funny)
Re:Audiophile pish (Score:3, Funny)
Caveats (Score:5, Interesting)
Remote digital speakers are a great solution for lowfi and mid i systems, but true audiophiles will not accept them.
Integrated amplifiers greatly reduce customizing, additional ADCs and DACs reduce resolution, increase the noise floor and change the sound.
Also, IP isn't my favored priority stream transport. I'd recommend a separate network for sound and I'd be weary of any delays incorporated in the IP transport. Think ping times! Also, encoding with the ADC does not include encapsulation into an IP packet, which can lead to worse lip-sync problems. Even 20ms delay makes me crazy (~1 frame). Of course, if its digital all-the-way, things can look brighter.
But a start is a start. Here's to hoping it continues to improve. Polk has a decent hifi range and a great R&D team. If anyone can find a better solution, its them.
Re:Caveats (Score:2)
You misspelled audio poseur...
Most of these "true audiophiles" are the kind who swear by valve amps, separate elements stereo systems and expensive gold cables. The truth is, there's no reason why well-designed TCP/IP-based speakers would be less good than analog ones, especially over 2m from the amplifier.
Re:Caveats (Score:2)
Re:Caveats (Score:2)
Re:Caveats (Score:4, Informative)
If we are talking about correctly designed playback equipment being operated properly, there is no audio quality reason to prefer one over the other. Clipping only occurs when an amplifier cannot amplify a signal further. This is not the regime you want your home stereo equipment to be operating in. Tube playback equipment that is not particularly linear (the amplification curve of indifferently designed tube equipment is gently "S" shaped) can sound "warm" even when not overdriven. I'd rather leave how the audio should sound to the artist and trust my equipment to accurately reproduce the artist's intention. Other than basic adjustments like volume or compensating for speakers that don't have a very good low or high end, I don't want my stereo coloring the sound for me.
If we are talking about playing music rather than mere playback, then tube amps have considerably more merit to them. A guitar player may intentionally choose to overdrive his amp or preamp as a way of altering timbre. Tube guitar amps are even set up to allow control over when and how this overdrive occurs. Typically, this will done in a preamp rather than the final amps as any device in the overdrive state is running very hot and using more power. For that matter, even solid state guitar amps can be intentionally overdriven although the idea is to intentionally introduce harshness rather than warmth.
Comment removed (Score:5, Funny)
Re:Caveats (Score:4, Insightful)
The fact that there are charlatans, too, shouldn't come as a surprise. I've hated 'stereo store salesmen' since back in my youth when those smug f*cks always had an attitude to cop when I came in the store needing audio connectors.
To write off the whole 'audiophile' community is to buy into the shit that certain sales-types want us to believe. In fact there IS such a thing as High Fidelity, and it isn't just sales numbers and/or a table printed in the manual that comes with junk components from Japan.
Re:Caveats (Score:2)
Re:Caveats (Score:4, Insightful)
The Audiophile understands that a great system starts with the speakers and works back to the source.
The Audiophile understands that spending time moving his speakers and furniture around the room will give you the best bang-for-buck improvement in sound.
The Audiophile understands that the difference between a CD player worth $200 and one worth $2000 is not as important as the difference between a set of speakers worth $200 and that worth $2000 - doubly so if you are keeping it digital until the tuner.
The Audiophile knows that the person who spend $1000 on each speaker cable is a wanker, while he calculates the per meter-resistance of his quality OFC cables and ensures that the paths to the drivers are as close as possible.
The Audiophile understands that a sub-woofer should not felt not heard. If its not SUBsonic, its just a woofer.
The Audiophile looks at the BOSE Lifestyle system with the contempt it deserves.
The Audiophile doesn't claim that the response of vinyl records is superior, but can appreciate the imperfections of the recording media as an important part of the whole listening experience.
The Audiophile doesn't store his CDs in the freezer, nor drawn on them with green texta.
Re:Caveats (Score:3, Informative)
Re:Caveats-accessories. (Score:5, Funny)
I better tell the experimentalists in the lab below using plain old kettle leads for their instruments that they're doing it all wrong, because some dude on Slashdot reckons there are people out there who can hear mains noise in the playback of their Jethro Tull LPs.
You bought those cables, didn't you?
Re: (Score:3, Funny)
Re:Caveats (Score:2, Informative)
What are you babbling about? Ping times on my home network run about 50 microseconds, 1/400th the length of time that would make you crazy.
Re:Caveats (Score:3, Interesting)
they're doing a lot of time management and synchronization as well.
http://www.netstreams.com/Documents/StreamNet%20Te chnology.pdf [netstreams.com]
Note that this is room-room delay, not stereo left-right jitter,
1ms there would be intolerable. Anything more than 50uS is probably discernable
by a trained listener with an audio test program. The average listener
might be able to hear 500uS phase shift L-R, but I think it'd only
show up in headphone
Nothing special (Score:5, Interesting)
Due to TCP/IP delays e.g. switching, you need some sort of buffering, which ends up meaning expensive memory on small chips. Once you have buffering e.g. 0.2 seconds, you should be fine. I ended up using a couple of little Burr-Brown PCM54 DACs, but the system was designed to feed digital into a decent professional DAC.
Disneyland Japan has had audio over ethernet for years as well; the setup there is huge, with hundreds of speakers over a large area.
Re:Nothing special (Score:2)
And if you go there the audio sounds terrible. Everything sounds like it is being played through a sheet of plywood. It sounds a lot like, well, most amusement park audio systems. All-weather outdoor speakers are not notoriously clean. Some of the indoor stuff isn't bad, though it isn't great... For some reason everything sounds a bit downsampled. I wonder if they're using dig
Re:Nothing special (Score:2)
Well, you hinted at this, but I'll be more explicit -- I suspect the reason that it sounds terrible has nothing to do with TCP/IP or ethernet, and everything to do with poor sound quality speakers and location, and there's probably some problems with the digitation of the sounds as well. Perhaps it's all based on some old cassette tapes somebody had lying around? (And really, `It's a Small World' sounds terrible no matter how perfect the sound system is :)
Re:Caveats (Score:5, Informative)
It's called PeakAudio (or Cobranet)
Upto 96KHZ audio streaming over ethernet. Integrated handling of delays caused by the network so every speaker device is able to produce the output at the same time, thus preventing echo-ing problems.
It's mainly used in very big spaces, like stadiums or trade-show halls.
Re:Caveats (Score:4, Informative)
That may be the perception, but in many cases (but not all), it's wrong. Integrated amps allow the manufacturer to to cutomize the amp for the specific driver which can greatly improve the performance of the overall speaker. for example:
MaGIC (Score:2)
Gibson MaGIC
http://www.gibsonmagic.com/ [gibsonmagic.com]
Re:Caveats (Score:5, Insightful)
To put it another way. 20ms is about the same as moving a speaker about 20 feet. That should be pretty clear to anybody how significant that is.
Re:Caveats (Score:2)
Re:Bullhonkey (Score:3, Informative)
Then you are an idiot.
As a musician, I can tell the difference in an audio interfact that is 40ms latent vs 20ms. Its *VERY* easy to tell...and I'm not even that great of player.
I know others that play and 20ms is way too high...I have to routinely tweak a friends machine to get it down to around 13ms so as to sound
Re: (Score:3, Informative)
Re:Bullhonkey (Score:2)
The problem comes when you have two speakers playing back stereo content, and one speaker is 20ms out. You may not hear it as a delay, but you will perceive it as a stereo imaging problem.
jeff
Re:Bullhonkey (Score:2)
This depends on source material a lot, but in some cases bad sync can reduce the quality of the final experience 25-50% (subjectively).
Re:Bullhonkey (Score:4, Informative)
http://www.calrec.com/product/lipstick.htm [calrec.com]
With the onset of high quality television transmission systems, even the small difference of 20-40ms of video/audio delay can cause programme impairment for the viewing audience.
So can most people. Some are more sensitive than others. I can also detect video refresh rate differences and frame rate differences quite easily.
2ms latency over a network IS minimal, but add digital encoding, ADC/DAC delays, and other delays inherent in this type of delivery and you'll see they can add up quick.
Heck, same link above:
However, multi-link MPEG transmission can also result in noticeable delay and loss of lip-sync.
1 frame (33ms) is HUGE especially when watching people talk. I've been to movies where I had to change seats from the delay, and I'm not OCD.
Re:Caveats (Score:2)
Re:Caveats (Score:2)
Re:Caveats (Score:2)
Presumably, one could either modify the signal at the source prior to sending it down the TCP/IP stack (which - I guess, would mean either a D->A->C conversion? - or some kind of digital trickery I'm not aware of) or maybe configuration info for the Amp could be sent to the remote amplifiers over TCP/IP as well. I assume someone at Polk is working this, because if you're running CAT5 to ceiling mounted speakers, you don't want to have to get on a ladder
Re:Caveats (Score:2)
Worse than that, you're relying on the overall system to be synchronized. The enthusiasts that would ca
Re:Caveats (Score:2)
If most people are using this to say listen to audio CD's (or ever worse, 128kbps mp3's) then there really shouldn't be a problem. I'm not sure how these speakers work, but if they are IP based, in theory you should be able to have the stream perfectly digital until they reach the speakers. At which point, you only have a single DAC, which in theory should reduce noise
The perfect speakers (Score:3, Interesting)
Who said anything about additional conversions. You can pull music directly off of CD in digital format and send it that way to speakers. One DAC, in the speaker, directly attached to the amp which is tuned exactly to the speakers and directly attached with no noise or tranmission loss. This setup by its very nature is the ultimate in audio quality. Sure analog heads who think that vinal sounds better than CD won't like it but they're all insane anyway. The los
Re:Caveats (Score:4, Insightful)
I have had a few "audiophile" systems in my life, but the lack of quality source material mastered for neutrality made it a wasted venture.
Re:Caveats (Score:2)
Re:Caveats (Score:2)
Re:Caveats (Score:2)
10000ms delay would also be bad if you are trying to watch and listen to TV with this system.
Apple Airport Express (Score:5, Informative)
Re:Apple Airport Express (Score:2)
Re:Apple Airport Express (Score:3, Interesting)
One really annoying thing with itunes is its inability to stream more than one song. There's no reason why it can't control multiple airports, each receiving different music. E.g. my wife likes her music in the kitchen, I l
Re:Apple Airport Express (Score:2, Informative)
Re:Apple Airport Express (Score:2)
Re:Apple Airport Express (Score:2)
http://www.g4tv.com/screensavers/features/50198/R
Woot! (Score:2, Funny)
DRM (Score:5, Insightful)
Should have a scary mod tag. (Score:3, Funny)
IP will give these no advantage at all. (Score:5, Interesting)
having multiple IP speakers on a network in the same room may also introduce phase offsets, since there's ALWAYS an inherent delay between receiving the network packets, decoding them, and sending the data off to DACs before the signal gets to the amplifier. Even a 2ms difference difference in delay/phase between two speakers in the same room is noticeable, and WILL screw up accurate stereo imaging. 2ms is not uncommon as a delay on an ethernet network.
Of course, mixing analog and IP speakers in the same room is right out.
Want the best audio quality, distance, noise-resistance for your speakers? fiber optic digital audio paths. end of story.
Re:IP will give these no advantage at all. (Score:4, Insightful)
Mono is also how 99.9% of retail/hospitality locations are wired, even the high end ones where they spend hundreds of thousands of dollars on the installations.
Also, forget about audiophiles and whether they would like these speakers. Audiophiles will never install in-ceiling speakers, and if they do it's purely for "background music" purposes around the house.
I believe that this product is for the rich geek that wants to be able to utilize his already-CAT5-wired home and be able to show off to their other rich geek friends.
Re:IP will give these no advantage at all. (Score:2)
For less loss on long speaker runs, I would use 600 ohm audio transformers.
Re:IP will give these no advantage at all. (Score:2)
Re:IP will give these no advantage at all. (Score:2)
The power supplies are external and sold separately for $800 MSRP and can power 2 of the linked speakers or 4 of the lower end speakers here [polkaudio.com].
The XLR point is very valid. I don't understand why all of this "audiophile" high dollar equipment uses the lowest common denominator cabling is beyond me. The best analog speaker inputs are those "5 way binding posts" and the best analog intercomponent interconnect are those cheesy RCA cables. Real audiophiles (prof
Wired Home (Score:2)
The wires also went literally everywhere, and were snaking around the apartment like an overgrown fern mons
Re:IP will give these no advantage at all. (Score:3, Insightful)
So, just what difference does fiber have over digital on coax or UTP or shielded twisted pair? Digital is digital with all else being equal, fiber doesn't gain much for short runs except some common mode noise reduction. An opto isolator can do the same without the handeling, cost and interface problems of fiber.
It is much cheaper to run the fiber signal over copper on short runs.
Re:IP will give these no advantage at all. (Score:2)
Still, there are a couple of common clocks that we have not considered as possible sync sources:
1) Eth
Re:IP will give these no advantage at all. (Score:3, Informative)
Comment removed (Score:4, Interesting)
Re:Latency? (Score:5, Interesting)
The advantage of TCP/UDP/Music-Transport-Protocol is that the medium suddenly becomes less relevant. Take wireless, for example. Imagine being able to cart your Big Speakers outside for a patio party without running a single audio wire. Or just to install speakers on the other side of your house (or in your shed) without having to grovel through the attic or crawlspace.
Imagine how useful this could be for concerts: the sound board now has one wire running to it---the power line. Likewise with your front, middle and back stacks, and your monitors.
Another plus is that we have a nice bidirectional protocol, as well as a chance for side-channel data: speakers can report their health back to the control panel, or to other speakers in the same stack. And since each speaker is doing its own DSP anyway, getting the equalization right for a given speaker is a matter of sending it a message.
You know what? Forget the speaker---sell compact, portable, one-speaker wireless-enabled amplifiers and let people convert their existing speakers into packet-switched audio devices.
Re:Latency? (Score:2)
Then rejoyce, for Creative has been making it for quite a while now.
http://www.creative.com/products/product.asp?categ ory=243&subcategory=247&product=9192 [creative.com]
They even make a compact Bluetooth type
http://www.creative.com/products/product.asp?categ ory=243&subcategory=248&product=14188 [creative.com]
Re:Latency? (Score:2)
That's not what the above poster or I am looking for.
That one is a single unit for two channels, non-amplified, and only plays MP3/WMA.
I want:
transmitting unit w/ digital 48/96khz spdif input. (Stereo is fine for me, although I can see 5.1)
multiple receiving units w/ a GOOD DAC and a GOOD QUALITY (50-100W) amplifier. One unit for each speaker.
I just want a way to place remote speakers in other room
Re:Latency? (Score:2)
Not quite 1 wire (2, power and CAT-5e) but here you go:
http://www.aviom.com/dspSolutionsDigitalSnakesOver view.cfm?cat=DigitalSnakes&sec=Solutions [aviom.com]
http://audiorail.home.comcast.net/ [comcast.net]
And finally CobraNet:
http://www.peakaudio.com/CobraNet/FAQ.html [peakaudio.com]
However, these are not really the same thing, since they don't run over TCP/IP. TCP/
WiFi (Score:4, Insightful)
Re:WiFi (Score:5, Funny)
I heard of this great new technology, something about Frequency Modulation or whatever. Apparently some genius figured out how to transmit sound *wirelessly* (no shit!) for miles, even without line of sight!
I'm sure we'll read about that in Slashdot sooner or later. If you don't catch the first article, you'll be sure to see the dupe.
Re:WiFi (Score:2)
Re:WiFi (Score:2)
Airport Express.
I know... it probably doesn't use TCP/IP, but it _is_ wireless...
Re:WiFi (Score:2)
Re:WiFi (Score:2)
I'm sure that if someone did do it the RIAA would be all over them for potential piracy uses.
End point Digital (Score:4, Informative)
what about h4x0rz? (Score:5, Funny)
Tried to set one up the other day... (Score:2)
Thank you, thank you, and be sure to try the veal.
Gold Plated Cat5 (Score:2)
Re:Gold Plated Cat5 (Score:2)
Will it trickle down to the low end? (Score:4, Interesting)
Right now, the only solution I've seen, has been to buy a mixer, but that would be more cables to string around. so I use three sets of $20 speakers...
Next innovation (Score:3, Funny)
No, wait, that's not new.
Turnkey Stream Client? (Score:2)
TCP/IP speakers... (Score:2, Funny)
You will need this first... (Score:5, Funny)
Re:You will need this first... (Score:4, Funny)
Question about timing (Score:2)
I can imagine mixing normal speakers and tcp/ip speakers and
ending up with out-of-phase or echo problems if there are unequal
delays. I could also imagine tv pictures out-of-sync with speakers.
Anyone have any idea/experience with this?
This sounds like a familiar concept... (Score:2, Interesting)
cat /boot/vmlinuz /dev/audio (Score:2)
I sometimes do that on my wife's laptop if she does not pay attention, or I am in the creepy mood
ahm yes
more on the topic: somehow i do not see myself turning to networked speakers
ps: some people say catting the kernel into the audio
What an Insanely Bad Idea (Score:2)
On the internet... (Score:4, Funny)
Re:what the??? (Score:3, Interesting)
Re:what the??? (Score:3, Funny)
But now I'm being silly.
Re:what the??? (Score:3, Insightful)
In those situations I would rather put an analog line-level balanced signal directly over the cat5, using whatever baluns and amplifiers I needed to accomplish that. It'd likely be cheaper, I wouldn't have to worry about latency or jitter, and as long as your amp's balanced inputs had common-mode rejection (pretty
Re:"amazing and wonderful" Slashvertisement (Score:3, Insightful)
If you want to mod this down, as the parent, feel free. I'll just post it again. But while I'm at it, spot the typo: "From the anouncement". So a slashvertisement, and an obvious spelling mistake. Just wait for the dupe and we'll have the archetypical Slashdot article.