Hello acechan,
Yes, Winamp & ZaraRadio are "just players" which generate sound on the "stereo mix" output of your soundcard, i.e. the sound you hear if you plug in speakers.
Broadwave is "just a streaming server" program that can stream out the audio from your soundcard (via the "live" stream), or can serve up a pre-existing audio file from the appropriate folder on the hard disk, assuming the URL issued to Broadwave specifies an existing file.
The clickable link on your website is just a URL which tells Broadwave what to do.
An example would be (without the spaces) http:// yourIP : portnumber / broadwave.asx ? src=pplaylistfilename to serve up a pre-programmed (by you) list of audio files,
Or http:// yourIP : portnumber / broadwave.asx ? src=ffilename to stream an audio file called filename,
Or just stream the live sound from your soundcard: http:// yourIP : portnumber / broadwave.asx ? src=1 etc
If you choose the live option, you need a program like winamp or Zara to generate the audio, or in fact any other audio player.
So, depending what links you have on your website, you could have any or all of these different options.
Hope this helps.