Broadcastify

You'll need an account on broadcastify.com / radioreference.com to set up your feed.

apt-get update
apt-get install ezstream lame -y

Add this to the bottom of the node stanza in rpt.conf for the node you want to broadcast.

outstreamcmd = /bin/sh,-c,/usr/bin/lame --preset cbr 16 -r -m m -s 8 --bitwidth 16 - - | /usr/bin/ezstream -qvc /etc/ezstream.xml

Meaning of outstream paramaters:
-- preset cbr 16 = use constant bit rate 16
-r = Assume the input file is raw pcm
-m m = Mode mono
-s 8 = sample rate 8
--bitwidth 16 = bit width is 16 (default)

This is the contents of ezstream.xml
You will need to add / edit your passwords etc. for Broadcastify. Place in /etc directory.

<ezstream>
    <url>http://audio3.broadcastify.com:80/mountpoint-provided-by-broadcastify</url>
    <sourcepassword>feed-specific-password-not-same-as-website-login</sourcepassword>
    <format>MP3</format>
    <filename>stdin</filename>
    <stream_once>1</stream_once>
    <reconnect_tries>0</reconnect_tries>
    <svrinfoname>Description </svrinfoname>
    <svrinfourl>http://www.radioreference.com/</svrinfourl>
    <svrinfogenre>Amateur Radio</svrinfogenre>
    <svrinfodescription>Description</svrinfodescription>
    <svrinfobitrate>16</svrinfobitrate>
    <svrinfochannels>1</svrinfochannels>
    <svrinfosamplerate>22050</svrinfosamplerate>
    <svrinfopublic>1</svrinfopublic>
</ezstream>