[aprssig] APRN news from Dayton!

Stephen H. Smith wa8lmf2 at aol.com
Mon May 23 18:43:06 EDT 2011

On 5/23/2011 2:17 PM, Bill V WA7NWP wrote:
>> However, there is an alternative.
>> IP-Sound is a Free application for audio exchange client to client over a
>> TCP/IPv4 network (Lan/Internet). The main purpose for the existence of
>> IP-Sound is to provide low quality audio 8-16kHz, with low latency for use
>> together with remote control software for "ham" radio amateur equipment.
>> IP-Sound is developed by SM5VXC.
>> It can be used to transport the audio part of a ham remote-control setup
>> (i.e. the mike and speaker audio) end-to-end over a network or Internet
>> connection. The advantage of IP-Sound over systems like Skype, MS Netmeeting
>> or Echolink is that it can use lossless codecs that won't mangle the
>> phase/amplitude integrity of audio signals received by the sound card. This
>> is critical to operating modes like PSK31 and SSTV.
> If an alternate tool is going to be used for the images, why not just
> send the picture as digital data instead of analog data on top of an
> VOIP audio system...

Because we persist in using analog FM radios, intended for voice,  on the RF 
links.    As long as we want RF<-->Internet<-->Rf  links to be transparent to 
analog radios, the Internet links need to use this kind of analog kludge.

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