Airport Express - Airtunes Audio Dropouts in client mode

The last week I spend trying many tips from this and other forums to get my Itunes running without dropouts, without any results. Heres a list what I did:
Firmware downgrade to 6.1.1.
Disabled IPv6
Increased Buffer Size in Itunes to BIG
Let OnyX runover
Disabled Dashboard
I works fine in Network Mode, but I cannot connect to Internet, and I would like to listen and surf...
My config: Netgear Wireless router, Airport Express and MacBook 2Ghz Intel Core Duo.
Sometimes it seems that playing directly from CD causes less dropouts - allthough the amount of data is much higher.
I also noticed that my windows XP laptop produces much less dropouts than MacBook, it reconizes even the remote speakers in Itunes, allthough there is no Airtunes software installed. I tried to install Airtunes there, but it didnt recognize AE, allthough it found the new network, well..
The system itself is rather new and with 1,5 GB of Ram it should be running like a rocket...
I think the problem is either that there is not enough bandwith, maybe Airport reserves an amount for netsurfing, or there is a hardware problem with the build in Aiport, that cannot stream continously audio in client mode.
No neighbor networks here, no microwave however there is a satelite dish cable, but this must disturb Aiport even when running in Single Mode, do I think wrong ?
Some users report that the dropouts occured when updating Itunes...what should I do ?
Send back to apple or wait for an update ?
Will apple take care for the few MacBook Core Duo Users or invest more in the newer series ( Core 2 Duo ) ?
Any help much appreciated. Greetings, Walter
Mac Book Intel Core Duo 2Ghz 1,5 GB Mac OS X (10.4.8)

After further testing it figures out that the problem seems to be at the Hardware of the Airport Express.
When running in client mode, the green light is flashing always, so data seems to be sent correctly from MacBook - also from a PC Laptop. So MacBook´s Airport is OK. The dropouts appear, allthough the light is continously flashing.
When running the seperate Network MAC and PC stream perfectly.
Now I´m sitting here, listen to music from PC and surfing with my MacBook...
I also tried to connect the second Network via WDS and configure the Internet Connection to my existing Network via WDS and use the AE as a remote Base Station - doesnt work, because it doesnt like the dynamic IP Adress of my Netgear Router, I think AE needs a fixed one, I wonder why AE could not handle a dynamic IP...
The other question is, if configuring Internet with WDS would solve the problem ? - I think that is the same problem just from another side, Airtunes and Internet on one AE, and the AE could not handle that...what do you think ?
If the Internetconnection breaks for 1 second it doesnt matter, but you hear that when airtuning music...
Thanks for any statements.
Mac Book Intel Core Duo 2Ghz 1,5 GB Mac OS X (10.4.8)

Similar Messages

How to Connect Airport Express to Existing Wireless Network (Client Mode)

I am posting this for everyone tearing their hair out trying to connect the Airport Express to your own existing home wireless network. After spending 2 hours last night installing this on my father-in-law's home network, I hope to be able to save someone else the agony we went through.
So here's the situation:
Say you already have your own home network set up, and all you want is to be able to use AirTunes to play music off iTunes into your speaker system. And, you don't need the printer sharing capability nor creation of another wireless network (2 of the features of Airport Express). Then this solution is for you - read on.
Unfortunately, Apple's user manual is very unclear how to connect Airport Express to your own network. When you look at the picture diagram they provide, they show Airport Express picking up its signal from another Apple-oriented base. This can make you think you need to buy another piece of hardware to make it work. DON'T If you read through the manual, the Support section here, etc., you will hear lots of talk about "Client Mode" - and that this is the only way to get it to work. Nice - but no one really tells you how to set up the Airport in client mode.
Do yourself a favor, toss that user manual aside and run these steps.
(Note: These directions assume your DSL/Cable Modem is hooked up to a wireless router or acts as its own wireless router)
1. Get a cat5 Ethernet cable (anything but an orange cable - that's a crossover cable) like you would use to connect your PC to your router to pick up the Internet.
2. Connect the Ethernet cable to the router on one end, and to the Airport Express unit on the other end.
3. Plug in your Airport Express unit to the wall (this will not necessarily become its permanent location - you will be able to move it later). The light will glow solid Amber for about 30-45 seconds while it starts up, then blink Amber. At this point, the unit is ready to operate.
4. Install the CD to the PC where your iTunes music is stored. This should be painless. Once you open the program, it should detect the Airport unit.
5. At this point, the on-screen wizard will present you with your options, and walk you through the setup. This is much like the user manual describes - and you should be good to go form here forward.
Some pointers:
- When asked if you want to create a new network, join an existing network, or connect via Ethernet, choose the middle option for joining an existing network. You will need to know the name of your network, the password to connect to the network (if present), and the type of encryption used on the network (e.g. WEP, WPA, etc.). Side note, WPA is recommended, as it is a higher level of security than WEP. You will be able to configure the Airport Express unit to automatically login to your network.
- I would recommend, when creating a password for the Airport Express unit, use the same password as your network, to avoid confusion.
6. The very last step will ask you to save the settings to the Airport Express. Here's the kicker - when you save the settings, you are TRICKING the Airport Express into no longer acting as a network broadcaster, but instead being a "slave" to your own network. What do I mean? You will lose the connection from your PC to the Airport Express - an error message will pop up telling you the unit can no longer be found. While you might think you did something wrong, you actually were successful!
7. Unplug your Airport Express, and disconnect the Ethernet cable from your router and the Airport unit. This will no longer be needed.
8. Go to your desired location where you want to plug in your Airport Express unit. Before plugging it in, connect your Audio cable from the Airport Express to your audio receiver. Once that is connected, then plug in the Airport Express unit. The light will glow solid Amber for 30-45 seconds while it loads, and then will blink Amber for a brief period of time before turning solid GREEN. When this happens, you have successfully connected the Airport Express to your home network!
9. Go back to your PC with iTunes. Open the Airport software - you should now have a listing for your Airport Express unit in the upper left. Click on this, and the wizard will guide you through connecting - you will need the password you created for the unit. You only need to go through this wizard once, and when finished, the software will tell you that can now use iTunes with your Airport unit.
10. Open iTunes. On the lower right, you will see a dropdown for Speakers, and it should be defaulted to My Computer. Click on that drop-down, and you will see the name of your Airport unit. Click on that name, and now your music will broadcast to the Airport unit!
11. Play a song in iTunes. Go to your audio receiver, and connect it to the channel for your external connection to the Airport Express unit. You should hear your music from iTunes. CONGRATULATIONS! =)
I hope these instructions were helpful - I am happy to answer any questions, so feel free to contact me, *******************@*****.**.
<Edited by Moderator>

Thanks for the detailed directions. You are absolutely correct in stating that people should toss the user manual; it's pretty worthless. I have had a problem setting up my new Airport Express as I have described in an earlier post - http://discussions.apple.com/thread.jspa?threadID=1839873&tstart=45
One quick question - does using your setup process set the AE up as part of a distributed network where the AE is acting as a wireless router where it is extending the range of your network? Or, is it simply a wireless connection to your stereo for iTunes? I am interested in having both, since my AE will be at the other end of the house from the main wireless router.
Thanks

Airport Express AirTunes Singal Dropout

Good Day All,
I recently added an AirPort Express to my graphite AirPort network and connected it to my stereo to stream music. The problem is, the signal keeps dropping out (not a problem for internet connectivity because the graphite AirPort provides that), and the music to the stereo stops briefly. This happens every few minutes, and lasts about 5 seconds.
Any ideas as to what might be causing this and how I might fix it?

This is a common problem - see this long running discussion on the topic for a lot of hints and tips:
Muhannad Al-Khurafi, "Audio Drop while using airtunes", 10:38pm Jul 21, 2004 CDT

Using Airport Express / Airtunes to play audio from Safari / OSX?

Just bought my first Airport Express. Can I use Airport Express / Airtunes to play out audio from Safari / OSX (or other applications) to my home stereo?

Hi Fenneberg:
Welcome to Apple Discussions and congrats on your AE purchase!
You'll need a 3rd application to stream music to your AE from other applications like Safari. It's called Airfoil and it can be found at: http://www.rogueamoeba.com/airfoil/
I hope this helps!

HOWTO: Linux Audio Players and the Airport Express (Airtunes)

Hi,
I've written a description on how I got amaroK (Linux audio player) to stream audio to my Apple Airport Express (Airtunes):
http://www.jroller.com/page/nwinkler?entry=amarokand_the_airportexpress
Nils
Other OS Fedora Core Linux

Here is a link comparing all of the Express versions - http://en.wikipedia.org/wiki/AirPort_Express
Here is an article on Airtunes vs Airplay - http://answers.oreilly.com/topic/2169-apples-airplay-what-it-is-and-how-its-diff erent-from-airtunes/

Regarding an Apple TV and an existing Airport Express/AirTunes setup

alright, i think i'm going to make the jump now for the new Apple TV. but i do have a few questions, particularly re: my existing Airport Express/AirTunes and wiring since i'm really maxed out in terms of open ports that i have left.
—my HDMI will have to go through a new HDMI smart switch hub into my older plasma that has one HDMI input. no problem, i've researched the smart switch, and realize the Apple TV may go in the low priority input since it seems to throw a continous current. if anyone LOVES their smart switch, throw me a bone here.
--however, i will need to go audio optical out into my receiver based on my current setup. and my receiver's optical inputs are all currently used. however, one is in use by a nearby Airport Express. since that AE has been used for AirTunes for years, i assume i can now safely ditch it's optical out since i will now be running my music through the Apple TV instead, correct? and therefore i will have my receiver's optical input now freed up, and there goes my Apple TV wire instead. just looking for verification here.
--since this AE is right there, will I get any speed advantage to the Apple TV by dropping an Ethernet cable from the AE's output into the Apple TV's Ethernet input, rather than relying on a pure wireless signal? my assumption is no, since they are both receiving the signal from my Airport Extreme on the other side of the house, but i thought it was still a worthwhile question.
--this particular AE has also been acting as a WiFi range extender (it's b,g,n). so i guess i will still just leave it plugged into the wall, but turn off it's AirTunes sharing, correct?
--(side note: if i wind up not needing the AE's optical out, and i don't need it's Ethernet out, i will then be moving it across the room since i'm ridiculously tapped out of electrical outlets by my entertainment center. and that's where the Apple TV power cord will go. just a boring fyi)
--i truly think i had another important question, but i cannot remember it. so i'll repost when it comes to me.
so i think i know my answers, but i always learn in these forums. so any thoughts or feedback is greatly appreciated.
thank you!

kevinopp wrote:
—my HDMI will have to go through a new HDMI smart switch hub into my older plasma that has one HDMI input. no problem, i've researched the smart switch, and realize the Apple TV may go in the low priority input since it seems to throw a continous current. if anyone LOVES their smart switch, throw me a bone here.
Older AppleTV did not play well with some switches, so it'd be sensible to get advice about one that definitely works with the new unit. They may have ironed out HDMI glitches but too early to tell.
--however, i will need to go audio optical out into my receiver based on my current setup. and my receiver's optical inputs are all currently used. however, one is in use by a nearby Airport Express. since that AE has been used for AirTunes for years, i assume i can now safely ditch it's optical out since i will now be running my music through the Apple TV instead, correct? and therefore i will have my receiver's optical input now freed up,
Yes, the AppleTV will replace the Airport for optical audio duties from your iTunes library. Add an iPhone/iPas Remote app and it should work very nicely as it did with the 1st gen.
--since this AE is right there, will I get any speed advantage to the Apple TV by dropping an Ethernet cable from the AE's output into the Apple TV's Ethernet input, rather than relying on a pure wireless signal? my assumption is no, since they are both receiving the signal from my Airport Extreme on the other side of the house, but i thought it was still a worthwhile question.
I doubt it would be of any benefit as AppleTV has wireless n anyway.
--this particular AE has also been acting as a WiFi range extender (it's b,g,n). so i guess i will still just leave it plugged into the wall, but turn off it's AirTunes sharing, correct?
In that case if it's an extender you may need it on for AppleTV to pick up the wireless, though I think I'd try and see if it receives the main signal adequately first.
--i truly think i had another important question, but i cannot remember it. so i'll repost when it comes to me.
I know that feeling.

Regarding a 2nd gen. Apple TV and existing Airport Express/AirTunes setup

alright, i think i'm going to make the jump now for the new Apple TV. but i do have a few questions, particularly re: my existing Airport Express/AirTunes and wiring since i'm really maxed out in terms of open ports that i have left.
—my HDMI will have to go through a new HDMI smart switch hub into my older plasma that has one HDMI input. no problem, i've researched the smart switch, and realize the Apple TV may go in the low priority input since it seems to throw a continous current. if anyone LOVES their smart switch, throw me a bone here.
--however, i will need to go audio optical out into my receiver based on my current setup. and my receiver's optical inputs are all currently used. however, one is in use by a nearby Airport Express. since that AE has been used for AirTunes for years, i assume i can now safely ditch it's optical out since i will now be running my music through the Apple TV instead, correct? and therefore i will have my receiver's optical input now freed up, and there goes my Apple TV wire instead. just looking for verification here.
--since this AE is right there, will I get any speed advantage to the Apple TV by dropping an Ethernet cable from the AE's output into the Apple TV's Ethernet input, rather than relying on a pure wireless signal? my assumption is no, since they are both receiving the signal from my Airport Extreme on the other side of the house, but i thought it was still a worthwhile question.
--this particular AE has also been acting as a WiFi range extender (it's b,g,n). so i guess i will still just leave it plugged into the wall, but turn off it's AirTunes sharing, correct?
--(side note: if i wind up not needing the AE's optical out, and i don't need it's Ethernet out, i will then be moving it across the room since i'm ridiculously tapped out of electrical outlets by my entertainment center. and that's where the Apple TV power cord will go. just a boring fyi)
--i truly think i had another important question, but i cannot remember it. so i'll repost when it comes to me.
so i think i know my answers, but i always learn in these forums. so any thoughts or feedback is greatly appreciated.
thank you!

I received my apple tv yesterday (wednesday the 29th). I bought a new computer on september 2 and also ordered the ATV and i got next day air. I think that why i got mine so quick. the tracking said i wouldnt get it until october first. But besides that the new apple TV is so awesome. i quickly viewed all my pictures and movies from my mac, used my netflix account, you tube, and a few other features. i also got my iphone to work as the remote which is way better than the standard remote. my only problem is i want to pair my wireless keyboard and cant find out how to do it...

Airport Express/AirTunes Not Working with New Verizon FIOS Connection

I was just set up with the new Verizon FIOS high speed internet, and now my Airport Express/AirTunes will not connect to my remote speakers like it did previously. The option for them is still there on iTunes, however when I select them, I get the horizontal barber pole for a minute, then the speaker selction goes back to computer.
In more detail:
Previously I had a Comcast internet connection which went through a Linksys wireless router. My Mini picked up the internet with this connection. Then I had an Airport Express hooked up to some remote speakers. They worked fine. Now, I have the Verizon wireless router hooked in directly to my Mini through the ethernet cable. I see the wireless network created by the Verizon router. I still see the wireless network created by the Linksys router. However, my iTunes can not connect to my AE/AirTunes speakers.
Note, I did reset the AE and then using Airport Setup Assistant, tried to locate it again, but it came up with nothing (other than my neighbor's new Verizon router).
Any help would be appreciated.
Thanks!

Still no luck. The green light is on for the AE.
Thanks in advance for the help.

Can i use my european airport express in israel as a client for streaming music?

can i use my european airport express in israel as a client for streaming music?
thank you!

Yes. There may be regional differences in the number of available wireless channels but it should work. Its power supply is universal.

Using Airplay with iPhone & Airport Express, outputing audio on both

Hello,
My nice new Airport Express works fine with my iPhone - awesome !
However, choosing to output audio to Airport Express stops audio on the iPhone.
I would like to continue outputing audio on the iPhone as well as the Airport express (both checked).
Is this possible ?
This way I could have a set of speakers connected to iphone in the living room and another set in the kitchen playing in unison...
I hope it's possible !
Thanks,
Dylan

Ok. Now I'm really annoyed. I bought a second airport express hoping to at least stream from the iPhone to two airports since I can't stream and play on iPhone.
Even though the iPhone sees both airports it will only play on one at a time.
How is this'playing music around your house'?
So the only way to play to multiple airports is with iTunes ?
That's literally ******** ie. the tech is fully capable but is being ******** by apple..?
Am I correct ?

I have an Airport Express connected via optical toslink to a dac/amp in turn connected to speakers. When using iTunes I get message "no speakers connected to Airport Express" and audio sound has drop outs.

I have an Airport Express connected via optical toslink to a dac/amp in turn connected to speakers. When using iTunes I get message "no speakers connected to Airport Express" and audio sound has drop outs.

Ok, if you are connecting the AirPort Express Base Station (AX) to the existing wireless network, then the DSL in the next room is most likely a combination DSL modem and wireless router. Thanks for clarifying that for me.
Although they may only be separated by a single wall, the building material used in that wall may be enough to prevent the AX from receving a "good" signal from the DSL router.
Since I don't know what computing equipment you have available, please check out this AirPort User Tip: AirPort - Optimal Base Station Placement to see if you can get some SNR measurements at the location of your AX. To do this properly, you will want to power-off the AX and only get these measurements for the DSL router.

MacBook core duo Sept. 2006 - the audio is a mystery. Any analogue out has bass boost with bass distortion. With digital out, by USB or Airport Express Airtunes, the frequency response is normal. Somewhere, Apple put in an analogue bass boost.. why?!

Since new, my Macbook core duo has sent all audio to all analogue outputs with frequency distortion. Some physical hardware or firmware in the analogue section adds a bass boost to the frequency response of the audio.... And, this boost adds bass frequency distortion to most, if not all, of the audio analogue output.
This happens for all audio sources, players, iTunes, videos, streaming audio/video, movies... any sound source available to the Macbook. No-one with whom I have talked about this problem, has ever heard of it. Not elegant ideas for reducing it are to use equalisers on players and iTunes. iTunes even has a preprogrammed "bass reduce" on its equaliser, as if it knows already that this inherent bass boost "feature" has been built into the Macbook, and cannot be defeated by the user.
The digital audio is of sufficiently high quality to play well on a very good to excellent sound-system; so, it's a shame someone has mucked around with the frequency response of the analogue conversion, by designing the frequency distortion right into the computer. This motherboard, (which includes the sound-section), has been replaced, along with the speakers, and everything sounds exactly the same as it was before.
To receive a flat frequency response and no frequency distortion, I listen on one receiver using Airtunes, (it doesn't matter whether or not the analogue or digital output jack is wired analogue or connected via optical cable.... the freq. response is flat); and I listen on a high-end stereo system using an USB output port to an A/D converter, passing the analogue result using long patch-cords connected to the "line-in" jacks of the stereo. The bummer is that most of my audio sources are not derived from iTunes... hence, I cannot use Airtunes with Airport express for them. I've tried using "Airfoil" without luck. The sound becomes distorted with sibilance and other frequency anomalies.
Question: has anyone else discovered this sound imperfection in any Mac product? And, does anyone know if Apple is aware of it? Finally, has anyone found an Apple fix for the problem; or, at least, come up with better solutions than I have?
Thanks heaps for any impute and answers you may supply!! junadowns

Army wrote:
This might not help you a lot, but if you want a stable system, try using packages from the repo wherever possible, look at the news before you update your system and don't mess things up (like bad configuration etc.).
When it comes to performance, you won't gain much by compiling linux by yourself! Just use the linux package from [core] or if you want a bit more performance, install the ck-kernel from
[repo-ck]
Server = http://repo-ck.com/$arch
(this has to go to the bottom of /etc/pacman.conf)
(use that one which is best for your cpu (in your case this might be the package linux-ck-corex).
Hmmm, Linux-ck-corex doesn't even load.. I am now trying to install the generic one. Hope it works.
Edit: I will first try linux-lqx...
Last edited by exapplegeek (2012-06-26 18:33:31)

Airport Express - Discontinuous Audio when used for streaming music

I recently installed a new iMac with Leopard along with Time Capsule as the base station connected wirelessly to the iMac. Added Airport Express to this network and everything looks like it works after a couple of tries.
When I play iTunes on the iMac and select the Airport Express speakers, I get a discontinuous sound. iTunes plays the music for 10 sec, stops for a few sec, then picks up where it left off...repeat endlessly.
iTunes plays back fine on the computer's speakers.
Any thoughts on how to fix the discontinuous music streaming ?

1. Check to make sure that iTunes isn't hogging all of your CPU when it is running. If your CPU starts running at 100%, you will get audio dropouts. Make sure that unnecessary processes don't load at boot time.
ok, cpu is fine, between 0 and 25% when playing
2. In Quicktime, Edit -> Preferences -> Quicktime Preferences -> Audio -> uncheck "Safe Mode". If this doesn't work, then recheck. You should reboot to make sure.
DOne, rebooted, undone, redone, nothing helps
3. In Airport Express Utility, Wireless -> Wireless Options -> Check on Use Interference Robustness
also done
4. If you have a lot of wireless internet routers in your neighbourhood you can try changing your wireless channel. Netstumbler will show you what's going on in your area.
tried all of the 13 channels!
5. If using a router and your Airport Express is a client of your router, move the antennas on your wireless router. One of the antennae should be at a 45 degree angle from the router so that the two antennas don't cause a conflict with each other. (Imagine dropping two stones into a pool of water where the waves created by the stones are equal to the radio waves produced by your router; the waves hit each other and distort the path of each one; by moving one of the antennae on an angle, this conflict is avoided.)
antennas turned as you told me, still not better
6. In iTunes, you might try changing the following: Edit -> Preferences -> Advanced -> Change the buffer streaming to "small" (or one of the others).
done, and also tried "medium" and "large"....
7. If you are using a third-party router, and you are comfortable with changing the settings, and if you have this setting, you might want to try lowering or increasing the Beacon Interval.
not familiar with this, what is a third party router? I have one main router for adsl and digital tv, + trying to get airport working for music...
8. Of course, don't have a metal filing cabinet, or hollow tubes (yeah, even toilet paper rolls -- so no iTunes in the bathroom, please) -- as these would also interfere with broadcast.
no interferences, no metallic cabinet, no toilets around lol
what can I do more? give it back to the shop, buy a MAC computer instead of my pc? I think I'm going to give that thing back to the shop....
Thank you very much for all your help but here I'm realy, realy getting fed up with this. Either it should work perfectly, either not, but here, sometimes it works, sometimes not, and there's no appearant reason when it drops.....you'll never know when it's gonna happen and for how long.
So disapointed!

Vista - airtunes audio dropout

Hello,
I'm having problems with Vista streaming to more than one airport.
When I stream from my Vista machine to more than one airport every minute there is an audio dropout of 2-3 seconds. When the songs starts the first audio dropout is after +/- 20-30 seconds, from there every next minute another audio dropout.
When I stream from any other machine in my house (all XP) I do not have this problem.
I tried everything. Change the channel, increase buffer, use 'bridge' mode, turn off firewall, change location of airport, but nothing helped.
All the software is up to date.
The strange thing is that it only happens when I stream to more than one ITunes speaker. So when I use the computer speaker with one airport I have the same problem. Or when I stream to two or three airports also audio dropouts.
When I stream to only one airport or the computer alone there is no audio dropout.
I really hope someone can help me!
Thanks in advance.
Jeroen.

Hello Caminada. Welcome to the Apple Discussions!
I don't have an answer for you, but maybe a suggestion. As you are already aware iTunes uses AirTunes to stream audio to an AirPort Express Base Station (AX). What happens "behind the scenes" is that iTunes first opens a port to establish a secure connection to the AX, and after successfully doing so, it then opens a second port to stream the actual audio content. The ports typically used in this exchange are TCP ports 5000 & 6000.
Vista, having a more robust level of security enhancements, may be the reason. I suggest that you (temporarily) disable the Vista OS firewall to make sure that the effort of opening these ports are not hindered in any way. Another option is to try running iTunes with Administrator privileges (right-click and select Start/Run as Administrator).

Airport network - multiple Macs + Airport Express/Airtunes

Hello all - I am in need of some advice on how to correctly setup a home network.
We have an Extreme base station (one of the older dome shaped ones) connected to our DSL modem - from this we operate 1 G4 Powerbook, 1 G5 iMac, 1 Intel iMac, 2 iPhones. All can currently access wireless internet with no problems. I am trying to add my old model Airport Express to this setup so that I can use Airtunes from the 2 iMacs - specifically so that we can use the iPhone Remote App to control the music coming though our living room stereo.
I have managed to set it up so that I can use Airtunes from the Intel iMac, but it seems that i have to disconnect from the base station network to do so - i.e. I can either have internet on my iMac or Airtunes, but not both - as a result I cannot use the Remote App on my iPhone to control the music.
I obviously have the network set up incorrectly - what do I need to do? Do I need to startover with the whole network design?

Here are the basic steps for configuring the AirPort Express Base Station (AX) for AirTunes ...
Perform a "factory default" reset of the AX
o (ref: http://docs.info.apple.com/article.html?artnum=108044)
To set up AirTunes on the AX, either connect to the AX's wireless network or temporarily connect your computer directly (using an Ethernet cable) to the Ethernet port of the AX, and then, use the AirPort Admin Utility to check these settings:
AirPort tab
o Base Station Name: <whatever you wish or use the default>
o Wireless Mode: Join an Existing Wireless Network (Wireless Client)
o Wireless Network: <select the existing wireless network>
Music tab
o Enable AirTunes on this base station (checked)
o Enable AirTunes over the Ethernet port (optional)
o iTunes Speaker Name: <whatever you wish>
o iTunes Speaker Password (optional)
In iTunes:
iTunes > Preferences... > Advanced > General
o Look for remote speakers connected with AirTunes (checked)

Airport Express - Airtunes Audio Dropouts in client mode

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