cdrdao (“CD recorder disc-at-once”) is a free and open source utility software application for authoring and ripping of audio and data CD-ROMs.

Several programs for authoring and writing CDs depend on cdrdao and provide a GUI, such as Brasero, K3b.

cdrdao powers Brasero, the default CD application for the GNOME desktop until around 2013.

[5][6] Cdrdao is capable of reading and writing audio, data, and mixed audio/data discs.

[2] It records audio or data CD-Rs in disk-at-once[7] mode based on a textual description of the CD contents, known as a TOC (table of contents) file that can be created and customized inside a text editor.