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Author Topic: relaying audio over internet  (Read 1314 times)

Mike Sullivan

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Re: relaying audio over internet
« Reply #10 on: February 05, 2014, 04:52:15 am »

You have a variety of internet-based options...Shoutcast works, but there may be a delay, something like 30-60 seconds.  You could use VoIP such as Skype, or a voice chat software such as Teamspeak or Ventrilo.  All of them are free.  Skype just needs two accounts on the same call to work, while Ventrilo and Teamspeak require a separate "server" software to run (free up to a certain amount of users, so won't cost you anything), however if the internet connection is slow or bad, you may have dropouts.  Just my two cents.
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Gary Fitzpatrick

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Re: relaying audio over internet
« Reply #11 on: February 05, 2014, 05:20:23 am »

You have a variety of internet-based options...Shoutcast works, but there may be a delay, something like 30-60 seconds.  You could use VoIP such as Skype, or a voice chat software such as Teamspeak or Ventrilo.  All of them are free.  Skype just needs two accounts on the same call to work, while Ventrilo and Teamspeak require a separate "server" software to run (free up to a certain amount of users, so won't cost you anything), however if the internet connection is slow or bad, you may have dropouts.  Just my two cents.

I have got it working using a shoutcast server....streaming from nicecast on my mac as Dick suggested. About 20 second delay so its not too bad. Hoping to use wifi so it should be pretty stable. If the wifi doesnt work out I can use 3g dongles
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Lyle Williams

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Re: relaying audio over internet
« Reply #12 on: February 05, 2014, 06:24:13 am »

Watch out if you build a system for a protest based on 3G data as a link.  Something that works well in a test run may not work so well when 1000 people show up at the site with their smartphones.

Something based on a mobile phone call is safer, but still not 100% reliable.  Get the call open some time before you need it, and don't hang up until the event is over.
« Last Edit: February 05, 2014, 06:30:04 am by Lyle Williams »
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Jean-Pierre Coetzee

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Re: relaying audio over internet
« Reply #13 on: February 05, 2014, 06:34:26 am »

Watch out if you build a system for a protest based on 3G data as a link.  Something that works well in a test run may not work so well when 1000 people show up at the site with their smartphones.

Something based on a mobile phone call is safer, but still not 100% reliable.  Get the call open some time before you need it, and don't hang up until the event is over.
This might also work, line in for the phone should be a possibility and then line out on the other side, could make for interesting wiring but most phones can accept a mic/line input these days, line output is simple enough...
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Tommy Peel

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Re: relaying audio over internet
« Reply #14 on: February 05, 2014, 02:09:54 pm »

A Danley Jericho JH90 would get the sound there...

*Like*  ;D
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Riley Casey

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Re: relaying audio over internet
« Reply #15 on: February 05, 2014, 02:40:03 pm »

Telephone hybrid, the old stand by.  Telos Model One or equivalent, easily rented, safe and reliable.

This might also work, line in for the phone should be a possibility and then line out on the other side, could make for interesting wiring but most phones can accept a mic/line input these days, line output is simple enough...

dick rees

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Re: relaying audio over internet
« Reply #16 on: February 05, 2014, 03:27:19 pm »

I have got it working using a shoutcast server....streaming from nicecast on my mac as Dick suggested. About 20 second delay so its not too bad. Hoping to use wifi so it should be pretty stable. If the wifi doesnt work out I can use 3g dongles

You'll find the latency varies for myriad "whatever" reasons.  I've experienced near zero to slightly upward of 15 seconds.  Funny thing is I can have two computers side-by-side logged in to the same server, each experiencing different latency.

You can "back up" your stream by logging in to the Shoutcast server using two or more different players.  Mute the ones you're not using and if you have any trouble with, say, WMP, you can just un-mute WinAmp or QT...or whatever you're using to get the stream.

Beware of Saturday nights, though.  What will work flawlessly the rest of the week can go to pot instantly if you have a nearby high-rise or project housing all watching movies, Skyping with the "homeland" or downloading porn.  Packet loss will start to give you fits.  But for voice only (where latency is not critical) you can increase your buffer size
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Chris Clark

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Re: relaying audio over internet
« Reply #17 on: February 05, 2014, 04:02:42 pm »

Watch out if you build a system for a protest based on 3G data as a link.  Something that works well in a test run may not work so well when 1000 people show up at the site with their smartphones.

Something based on a mobile phone call is safer, but still not 100% reliable.  Get the call open some time before you need it, and don't hang up until the event is over.
THIS. The park I work at has a Verizon tower literally 50 feet off the property line, works great most of the time, no dead zones on the park, etc... But any day there's a concert (20,000-30,000 people there instead of 5,000 to 10,000) your chances of getting a 3G/4G OR voice connection drop amazingly. And that was with a tower specifically designed to handle high volume at the location, not a standard cell site in the middle of a city where cells are usually closer together and have to hold fewer connections at a time.

Point is, don't rely on the mobile connections unless you can test them under the same conditions they'll be operating under, and even then don't think it is foolproof. I personally would go the landline hybrid route, honestly.
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Tim McCulloch

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Re: relaying audio over internet
« Reply #18 on: February 05, 2014, 07:00:05 pm »

Yes, yes, yes.  Lyle, Dick, Riley and Chris speak the truth.
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Lyle Williams

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Re: relaying audio over internet
« Reply #19 on: February 06, 2014, 01:58:43 am »

... Of course is does depend on event details.  If you are expecting 100 people don't go overboard.  :-)
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