[Icecast] Best way downsample stream from 128 to 56 on the server?

[peter at theneb.co.uk]

Hi Phillipp,
It depends what software you are using, ourselves are using Darkice and it's
quite simply to create a second stream for 56k users.
What software are you using for source?

Quoting Philipp Flesch <Philipp at phflesch.de>:

> Hi!
> We want to over our stream in better quality (128 or 256) - but we still have
> listeners using ISDN ... what's the best way to create a 56'er stream 
> from the
> 128er send to the server?
> The downsampling has to run on the debian streaming server.
>
> Greetings from Germany
>
> Philipp
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