Ajay Homer creator of Dc Raptors has updated his site with this news:

A nice response, so he you go. Head over to the Game Downloads page to pick up the background music patch for Raptors! It works fine with dos quake, winquake, TomazQuake (not v1.44) Darkplaces and DcQuake.
Patch contains an updated progs.dat (put in pak0.pak) and the rap.wav, which should go in Sounds/music within the pak0.pak folder.

To find out more go here