For HP-UX the glib and gtk are available from:
  http://hpux.connect.org.uk/
  http://hpux.asknet.de/
You will also have to install the depending libraries and programs including 
gcc. Xcdroast has been successfully tested for HP-UX 10.20 and HP-UX 11.0.

There are two different audio implementations for the playback:

1) Using the audio server daemon of HP-UX:

   This implementation uses the Aserver daemon of HP-UX for playback. It
   enables to use the audio hardware over a network for a workstation or a
   X station. The audio server is set via the DISPLAY or AUDIO environment 
   variable. 
   Using the audio server requires the Audio Developers Kit of HP-UX. 
   To set the volume, output device have a look at the man pages of
   audio, aserver, AudioCP and the pages they refer. The advantage of this 
   implementation is a better buffering of the output stream. The additional
   compiler flag hpux_alib chooses this implementation.

2) Using the raw audio device:

   No Audio Developers Kit of HP-UX required. Gaps in the output stream if
   system is under load. Nothing more to say.