Winamp for broadcasting is only available for the Windows operating system – Download it here. You will also need the latest DSP plugin, available here.

Winamp Download

https://winamp.en.softonic.com/

or at Winamp for newer version

https://www.winamp.com/downloads/

DSP Plugin Download

https://download.nullsoft.com/shoutcast/tools/

Helpfull guides.

https://help.radio.co/en/articles/899773-winamp-shoutcast-dsp