Audio over IP

[gettinbyagain]

Anyone have any reccomendations for sending audio over a highspeed internet connection? This would be used for remotes, etc, and latency is not a big deal...
Thanks!

 

[kharnack]

If you have a Telos Xstream, upgrade to the latest firmware (free) and it will communicate over your IP connection to another Xstream at the other end. Delay depends on the algorithm - MP3 or AAC. Buffering is settable from 0.25 second to 10 seconds.

Best,

Kirk Harnack
Telos

 

[SirRoxalot]

Free To Play With

If you'd like to play with an inexpensive solution that might work, check out TeamSpeak. You can download both the server and client versions for free. You can control the bandwidth, and you can password-protect your server to keep it from public access. You'll need to have control of the Internet firewall at both ends so you can open port access.

TeamSpeak has several codecs available, and can provide much better audio than a phone line. Latency is variable, depending on your Internet connection and network traffic.

This is not as high a quality solution as Telos Xstream, but sure is cheaper. If you decide to use it for commercial purposes, you're obligated to pay $29.95 for a license.

One other thought... I wonder if Remote Desktop in Windows XP would stream audio back from the host machine to the remote?

 

[gtomas]

http://www.barix.com/audio.html

http://www.audiotx.com

http://www.comrex.com/products/access.htm


Regards,
Goran Tomas

 

[CW]

Re: Free To Play With

If you'd like to play with an inexpensive solution that might work, check out TeamSpeak. You can download both the server and client versions for free. You can control the bandwidth, and you can password-protect your server to keep it from public access. You'll need to have control of the Internet firewall at both ends so you can open port access.

TeamSpeak has several codecs available, and can provide much better audio than a phone line. Latency is variable, depending on your Internet connection and network traffic.

This is not as high a quality solution as Telos Xstream, but sure is cheaper. If you decide to use it for commercial purposes, you're obligated to pay $29.95 for a license.

One other thought... I wonder if Remote Desktop in Windows XP would stream audio back from the host machine to the remote?

I didnt read the entire web page but does TeamSpeak support stereo or dual mono as well??? This could be a solution in trying to remote some Motorola Gold Elite Dispatch consoles (using Selected Audio and Unselected Audio feeds).

Thanks!

 

[BofH]

Try http://livelink.sourceforge.net

- AAC Codec (libfaac / libfaad2)
- Reasonable latency (under 250ms)
- Bi-directional
- UDP
- Handy Bandwidth Monitor

The default sampling rate is low - however after corresponding with the author he suggested downloading the source code and modifying it, as it's written in Visual C++ 2003 I'm in the process of taking a look at the source code now as he also suggested there's room for improvement in the latency - it would be great if AAC LD or AAC+ could be implemented.

One small drawback is that it won't self navigate a NAT firewall - you need configure a portforward on port 3333

Enjoy!

 

[HD_Ready]

how do you save the settings? I don't hear a difference when I adjust the slide bars.

 

[nyc_eng]

If you have a Telos Xstream, upgrade to the latest firmware (free) and it will communicate over your IP connection to another Xstream at the other end. Delay depends on the algorithm - MP3 or AAC. Buffering is settable from 0.25 second to 10 seconds.

Best,

Kirk Harnack
Telos

I've tested the above EXTENSIVELY, over the public Internet at that, it works very well (AAC has error concealment which masks any small bits of data that might get lost or arrive late). I wouldnt use it for an STL unless the path was pretty reliable (T1, wireless lan link, etc) and had some QOS on it, but I'm waiting for the right opportunity to use it for a real remote (as opposed to just the test bed) and have no real worries about it holding up.

Currently the delay (using AAC over IP) is more then with ISDN or POTS so talking up a song probably would be very difficult or impossible live, but aside from that, there isnt much I can complain about. Last I talked to Telos was considering a software release at some point to allow AAC-LD (or even G722, but they wernt too keen on G722 for its lack of dealing with errors) to work over IP which would cut down on some of this delay.

No box is perfect, but the Xstream comes dam close to it. Many of the other IP codecs either just dont cut it, or require a computer at one or both ends to setup the codecs- definitely not something that is practical in a lot of applications (like remotes!)- Xstream just sits there and works all on its own.