Gcdmaster is a front-end to cdrdao, a CD mastering software. GCDMaster is the Gnome GUI front-end to cdrdao, a Disk-At-Once CD Mastering project. GCDMaster makes it easy to visualize and manipulate audio information before burning it onto CD. Its features include: cut/copy/paste of sound samples, track marks edition and silence insertion. Writes audio CD-Rs in disc-at-once (DAO) mode allowing control over pre-gaps (length down to 0, nonzero audio data) and sub-channel information like ISRC codes and CDTEXT. GCDMaster also supports on-the-fly CD copying.