Bluetooth, AirPlay, DLNA: What's The Best Streaming Format Today?

Published On: September 30, 2013
Last Updated on: October 31, 2020
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Bluetooth, AirPlay, DLNA: What's The Best Streaming Format Today?

Dennis Burger takes a look at the different options out there for streaming audio technologies, examining their implementations and the benefits and downsides of each technology.

Bluetooth, AirPlay, DLNA: What's The Best Streaming Format Today?

By Author: Dennis Burger

Dennis Burger is a native Alabamian whose passion for AV began sometime before the age of seven, when he dismantled his parents' brand new 25-inch solid-state Zenith console TV and exclaimed--to the amusement of no one except the delivery guy--that it was missing all of its vacuum tubes. He has since contributed to Home Theater Magazine, Wirecutter, Cineluxe, Electronic House, and more. His specialties include high-end audio, home theater receivers, advanced home automation, and video codecs.

Wireless-Streaming-Options-small.jpgPop quiz, kids: when was the last time you saw a fancy new portable speaker system with an actual, physical smartphone dock? If you have an immediate answer to that question, either you work for the manufacturer that makes said device, or you spend way too much time reading consumer electronics news sites (not that there's anything wrong with that). The fact is, the physical docking connector is going the way of the dodo for anything other than charging and file syncing. If you're playing music from your smartphone or portable media device (or even your laptop computer) to a self-contained media player, home theater, or multi-room music system, chances are good that you're either streaming it wirelessly or wish you could.

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But how? As with most emerging technological trends, there isn't one universally agreed-upon wireless audio streaming standard. Depending on your portable media source, you may even have a choice of several different methods for moving your music from Point A to Point B through the ether, and not all of them are created equally. Let's look at the salient points for the most common wireless streaming audio technologies, starting with the most ubiquitous.

Bluetooth isn't merely the most common wireless technology used for audio streaming, it's also the simplest - at least in terms of setup and operation. To stream audio from your portable player to a Bluetooth speaker or receiver, you merely need to pair the two devices (a fairly simple and secure process these days that may require you to enter a four-digit password) and press play on your smartphone or other media player. The signal is beamed directly from source to destination, without the assistance of any form of router or other intermediary.

You'd never know it was so simple from looking at the specs list for the average Bluetooth-capable device, though, which is likely to include a mouthful like "Bluetooth v2.1+EDR, Class 2 with SPP, DUN, FAX, LAP, OPP, FTP, HID, HCRP, PAN, BIP, HSP, HFP, A2DP & AVRCP profiles and aptX and AAC codec support" somewhere amongst the rundown of supported formats. Don't freak out. You don't actually need to know what most of those letters and numbers mean. The Class of the device is of interest because it defines the range - in other words, how far your Bluetooth transmitter can be from your Bluetooth receiver. Class 1 devices can have a range up to 100 meters (usually more like 20 or 30); Class 2 devices have a maximum potential range of 30 meters (usually more like five or 10). The reason for all of that other tacked-on jargon is that Bluetooth was originally designed as a short-range personal network - a wireless replacement for RS-232 cables. Enhancements have been added to the technology since its creation to allow it to serve other functions: Human Interface Device Profile (HID), for example, facilitates things like wireless mice, keyboards, and video game controllers, whereas Headset Profile (HSP) provides support for the wireless headsets used with mobile phones. For our purposes, though, the important alphanumerics to focus on are A2DP and aptX.

A2DP (Advanced Audio Distribution Profile) is, simply put, a one-way wireless stereo pipeline between a transmitter (your smartphone, tablet, media player, laptop, etc.) and receiver (your wireless speaker system, AV receiver, dongle, etc.). If your portable device plays music and features Bluetooth, it almost certainly supports A2DP. If a device is marketed as a Bluetooth speaker or Bluetooth add-on for an AVR or other music system, it almost certainly supports A2DP, so you can assume they'll make music together. Beautiful music, though? Maybe. Maybe not. A2DP doesn't deliver a very roomy pipeline for music, which means that the music on your portable media player or smartphone (or computer) probably needs to be compressed before being delivered through the airwaves. By default, A2DP relies on Low Complexity Subband Coding (SBC) to squish the signal, but it can also use other codecs (coder-decoders or compressor-decompressors) to get the job done. One of these is AAC, the codec of choice for iTunes music downloads.

The codec preferred by most Bluetooth streaming aficionados these days is aptX, which purports to deliver near-CD-quality streaming. Not all Bluetooth receivers and speakers support aptX, but many do, as do a number of Bluetooth headphones. Not all media players support it, either. Notably, most HTC and Samsung phones do, but the iPhone doesn't, which brings us to...

Originally called AirTunes back in the days when it merely supported audio, Apple's proprietary content distribution protocol is the music streaming method familiar to most iOS users. AirPlay is in some ways simpler than Bluetooth and in some ways more complex. In its most typical implementation, an AirPlay-capable speaker, AV receiver, Apple TV, or add-on receiver (which can be anything from a dongle to a full-blown Apple AirPort Express is connected to your home network, either via Ethernet or WiFi. Music is streamed via that network from your portable iOS device or directly from iTunes on your computer. In other words, to get music from Point A to Point B via AirPlay, it has to travel through your router (unless you're using AirPlay Direct on an ad hoc network but, my goodness, this article is already getting complicated enough, so let's pretend I didn't type that). That's true whether you're streaming tunes via apps like Spotify or Pandora or streaming the music stored on your iPhone, iPad, or laptop/desktop. My favorite way of employing AirPlay is to use the Remote app on my iPhone or iPad to send files directly from the iTunes library on my computer to the Wireless Music Bridge connected to my Control4 system, but tracing out the networking signals involved there can get a little silly. Any way you go about it, with all involved devices connected to your home network, you simply press the AirPlay button on the source device, select the destination, and you're done. In many cases, AirPlay is built into IP-controllable devices that will power themselves on as soon as they sense an AirPlay signal is headed their way. It's the ultimate in laziness.

Of course, given that it relies on WiFi for wireless streaming, nailing down the range of AirPlay isn't quite as simple as it is with Bluetooth. It really depends on the quality of your network. Assessing its quality is a little easier, though, since AirPlay uses the Apple Lossless codec exc
lusively, which means that anything up to CD-quality files will be delivered with no lossy compression. Anything better than CD quality will get downsampled to 44.1 kHz.

Of course, using AirPlay also means you're locked into the Apple ecosystem, which has a couple of implications. First, you should probably forget about downloading and streaming FLAC files. I'm not saying it can't be done; I'm merely saying that, if you've read this far into a wireless audio streaming primer, you probably shouldn't try. Secondly, if you go hog-wild buying AirPlay-compatible receivers, speakers, and so forth and then decide to switch to Android down the road, you're stuck with a lot of arguably useless gear. That's just the nature of proprietary systems, and that may be one of the reasons why many manufacturers are gravitating away from AirPlay support. There are similar open-architecture alternatives, though, such as ...

Click on over to learn about DLNA, Sonos, and the rest . . .

Think of DLNA as "AirPlay for devices that aren't made by Apple." Like AirPlay, DLNA relies on your home network for streaming and, as such, it is just as difficult to pin down in terms of range. It's totally dependent on the quality of your network. DLNA is supported by pretty much every major non-Apple smartphone, including Android devices, Nokia Windows phones, and Blackberry 10. And yes, there are even DLNA apps for iOS - some of them are built-in control apps for AV receivers (the Onkyo Remote iOS app is a notable example), and some of them are dedicated servers that allow you to stream music from your iOS device library to DLNA-compatible players via your home network.

As for the availability of DLNA-capable players, there are a lot of them. Literally millions. There are even DLNA-certified refrigerators, for goodness' sake. But that brings up an interesting point. Just as not all Bluetooth devices are designed for music streaming, not all DLNA-capable devices are designed for music playback. I wasn't kidding about that DLNA-capable refrigerator, but try to stream music to it and nothing will happen. It relies on DLNA for photo sharing only.

The upside is that, given the rather open architecture of DLNA, you're much more likely to be able to stream FLAC and other high-resolution file formats. That ability, of course, depends on the player itself and whether it supports such files. The Pioneer Elite SC-79 networked AV receiver, for example, will accept streaming FLAC files. The Sony PlayStation 3 - which for quite some time was one of the most popular DLNA players - won't, at least not without some serious tinkering.

DLNA can also be a bit fussy overall, despite the fact that it's based on Universal Plug and Play, which is again probably a result of its open architecture. Servers can crash. Setup can be difficult (or it can be a snap, depending on the app). Things have, of course, gotten a lot more streamlined as DLNA has matured, and the interfaces have gotten a lot prettier. But DLNA still has a bit of a reputation as a tinkerer's streaming audio system. If you're looking for something a bit easier, there's always...

Sonos hit the scene in 2005 and positively revolutionized the multi-room distributed audio market. Before that, listening to the same source of music in multiple rooms in the house generally meant relying on incredibly expensive audio matrix switchers and miles of wiring buried in the walls or ceilings, more often than not operated by advanced control systems costing tens of thousands of dollars.

Relying on a mix of WiFi and its own proprietary network technology - called SonosNet - the original Sonos system consisted of ZonePlayers, which formed their own mesh network (in other words, the more players you added, the stronger the network became), to which you either connected a set of bookshelf speakers or ran a line-level audio or optical digital output to your home sound system like any other source device. From there, you used a dedicated controller to select music from your computer and streamed it anywhere in the house. Since then, Sonos has introduced numerous new players, some with built-in speakers, as well as a soundbar that can be paired with Sonos players to form a completely wireless surround sound system. Numerous Internet music services have been added, as well, including Pandora, Spotify, MOG, and iheartradio. These days you can even stream music directly from iOS or Android devices.

Setup is also incredibly simple - so simple, in fact, that it either works or it doesn't. I've set up a couple of Sonos systems in my day and, with some computers, it was a matter of plugging it in and patting myself on the back for a job well done. During my Windows 7 days, though, I couldn't get a Sonos system to access my music library to save my furry Wookiee butt.

For being a proprietary system, Sonos does support a wide range of audio file formats, including MP3, WMA, AAC (although not DRM-protected iTunes downloads, if you still have any of those), OGG, both FLAC and ALAC (up to CD quality), AIFF and WAV (with limited metadata support), and even Audible audio book downloads.

And the Rest...
Of course, this isn't an exhaustive list of every streaming audio option out there. There are other proprietary formats, each with its own pluses and minuses - like Kleer, an audiophile alternative to Bluetooth that operates in much the same way, except that it has vastly more bandwidth, requires a transmitter dongle attached to either your portable media player or laptop, and has only ever seen much hardware support from Arcam and Sennheiser. But if you're just dipping your toes into the streaming audio waters, chances are good that one of the above will suit your needs. Which is the best? Again, that depends on what sort of hardware you already own, what sorts of files you want to stream, and how willing you are to find out just how deep the rabbit hole goes.

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  • Paul
    2015-08-19 04:56:46

    I dont own one apple device because of this, its either there way or no way. With other players its universally standard and you have dozens of options. I enjoy flac files downloaded and shared to any device without fuss out of the box.

  • GR
    2015-01-27 14:41:27

    That's ok music beyond 44.1/16 is not that important. Even today is hard to find popular albums in that format. 44.1/16 is CD quality bit by bit and that's plenty even for audiophiles

  • mike c
    2014-10-28 04:25:43

    Home Sharing must be turned on in iTunes. Choose File, Home Sharing, enter apple ID and password and then select "done" then select the square with the triangle next to the volume slider and you will see the devices connected to your network, select and device and play and song from iTunes and it will start playing on that device

  • mike C
    2014-10-28 04:14:06

    Amarra or Audirvana players, play just about and kind of file and will see Airplay devices as a streaming option.

  • mike c
    2014-10-28 04:12:30

    Very true, I just use a usb drive loaded with hi res files of flac 24/96 with my AV receiver and use AV receiver remote to access and play music through home theater. I connect my laptop by usb A/B connector with Audirvana player to my stand alone DAC connected to my 2 channel system's amp and play hi res files through that system. Both methods avoid and down sampling due to bandwidth issues of wireless networks or bluetooth protocols

  • mike C
    2014-10-28 03:59:53

    328kbs SBC is not high Q, it is less than even CD quality. Remember that Airport express/Apple TV will down convert all high res files to 16 bit/48 khz max. That includes real high res files that are 24 bit/96 kHz or higher.

  • hhy2k
    2014-07-14 10:32:24

    Just a note for everybody bashing Apple here. IPhone will stream on a simple Bluetooth dongle with 328 kbs SBC (that is HQ) or 250 kbs AAC even if it doesn't support AptX. Make sure your receiver dongle support AptX for too shelf Android and AAC for Apple.

  • Redisqovered
    2014-04-13 03:08:02

    You know, it might just be easier to bypass wireless depending on the situation. No quality loss, no range limitations, less complexity, basically universally supported.

  • thope
    2014-03-15 05:51:23

    apt-x is support is built into all apple products. reviewer clearly does not test products that he reviews.

  • Neill6705
    2014-01-26 15:24:30

    I have an Airplay ecosystem and the only Apple device I have is an iPad. I have two Raspberry Pis and a wireless router running Tomato firmware configured as AP receivers and I can play music from my rooted GS3 using an Airplay app. It's better quality and more reliable than Bluetooth and simpler than DLNA (after setup, that is). Plus, Raspberry Pis are dirt cheap ($25 - $35). Airplay is great once you take Apple out of the equation.

  • Juan Manuel Guajardo Suarez
    2014-01-23 14:28:33

    on Windows you just have to right-click and mp3 files for example an then select "Play to" your DLNA device on the contextual menu and that's it.

  • ben
    2014-01-10 00:16:56

    as time goes by, now a day, there're android apps that can stream to airplay devices too...

  • Red
    2013-12-31 00:46:26

    If I have a DNLA compatible receiver and I want to stream music to it, what software will I need on the computer to stream the music (assuming I am not using AirTunes - which would use iTunes). For my hi-def library, I want some way to stream to the receiver, and ITunes is not an option. Thanks. Red

  • jajamen
    2013-12-30 01:38:18

    DLNA seems to be the future then.

  • Paul Meyer
    2013-11-27 02:05:32

    I have a sony smart tv 3d ect and a android 3 i notice that utube had a work fomat, how do i get the rest to go to my tv is there afree dlna app that will do it? Thanks im dissable and at my age 55" is better than 7"

  • Col
    2013-11-12 09:58:11

    To get shared music on your apple device (iphone etc) to play on Bluetooth speaker; 1 make sure "home sharing" is turned on in your computer's itunes library (itunes/ preferences/ sharing). This should be the case already if you are using airplay. 2. Open the music app on your apple device / tap on "More" in right hand bottom corner. 3 tap on "Shared" 4 tap on the named itunes library 5 wait for the library to load (circle fills in). 6 go to songs or albums to play music. 7. Connect your apple device to Bluetooth speaker.

  • Alexandru Necula
    2013-11-12 07:41:25

    When you talk about the shared part, what exactly do you refer eat? Is the iTunes Match option. I am doing this right now. Can you detail the idea of shared music?

  • Col
    2013-11-12 07:10:12

    The best way to play your itunes computer music via Bluetooth is to use the "shared" part of your music app on the iphone / ipad / iPod touch to stream your itunes library to your device and then send the selected music to your Bluetooth speaker. This is a clunky workaround - airplay has better sound and a better solution if you have the right set up.

  • Alexandru Necula
    2013-11-11 11:47:24

    Hi, I have the following situation. I have my iTunes library on my iMac. I use remote on all my apple devices in the house. The whole family is sharing the library. We also play the music on arround 5 airplay speakers. Recently we bought some mini bluetooth speakers for when we are outside. The problem is that I can not play the music stored in the library on my bluetooth speakers, I also realised I can not play it even on my Headphones. Any idea on how to fix this? maybe I do something wrong. Thank you

  • Guest
    2013-10-14 19:30:39

    We've found AirPlay to be the best solution for our clients. Ease of use being a main contributing factor. Generally, if you're looking for AirPlay you're already tied into the Apple eco-system. Sound quality is good as well.

  • Trevor
    2013-10-01 17:10:48

    If the Bluetooth transmitter has a level control make sure it is set to maximum otherwise there may be a loss of sound fidelity. The speaker volume is best controlled at the receiver. On a related topic (for the very smart people here) I use my iPhone II on headphones and streaming to my Bose Soundlink II via Bluetooth, I need a simple equalizer app that works in both situations. I have iOS 4.2.1, the latest version for the iPhone II. I did a search of compatible apps at iTunes but the only found an app by SRS, not quite what I was looking for? P.S. The iPhone iPod app has a simple equalizer (accessed via SETTINGS) but I need a universal app that works for both iPod and other sources. P.P.S. Please don't suggest posting at the Apple forum, I did already but my post got lost in the rush of hundreds of iOS7 posts per hour, there are a lot of unhappy users out there!!

  • Robert Thurlow
    2013-10-01 16:21:34

    I like Airplay, and sought ways to do it that don't mean buying Apple hardware. I run a piece of free software called Shairport on Windows 7 - it accepts Airplay audio streams. I also found an Android app which can be used to send Airplay audio streams. On the other hand, I bought a couple of Bluetooth A2DP-capable receiver dongles which take power from a USB port and emit stereo audio for under $10 each. One is letting me ditch the cables in my not-quite-BT2.0 car. That's not bad.

  • dick bell
    2013-10-01 16:00:35

    There's a new product that very few people know about that does wireless very very well.... I have one hooked up to one of my OPPO players and I get to use my best set of head phones in a wireless configuration even though the head phones are not wireless... the product has just been released .. it is the Fiio W1

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