Alcohol 52% vs CDEmu

Alcohol 52% creates virtual CD/DVD-ROM drives so users can play discs without the physical media. It supports up to 31 virtual drives and can mount optical images in formats including CCD, CUE, ISO, BWF, CDI, MDS, and NRG. The listed downloads are for Windows, excluding Windows 98 and ME. A free 15-day evaluation period is available, with capabilities limited only by the number of virtual drives available. The Free Edition is also listed at free and is marked not for business use. A paid single licence costs 27.00 USD once and includes lifetime free upgrades; online activation is required. The maker describes home users backing up game CDs and movie DVDs, as well as librarians and school administrators archiving recordable media. DVD titles protected with CSS cannot be backed up due to legal restrictions. Support options include manuals, FAQs, a support forum, and direct email contact. The privacy policy says users may choose to join the Bright Data network for some premium features and can turn that setting off in the app.

CDEmu emulates optical drives and discs on Linux, including CD-ROM and DVD-ROM media. Its kernel module provides a virtual SCSI host adapter that connects the Linux kernel with a userspace daemon, while libMirage gives access to many optical image formats, including MDS, CUE, BIN, ISO, NRG, UDF, DMG, CSO, GZ, DAA, and ISZ. Emulated media can be mounted in Linux, with automounting available. The project also describes experimental CD-R and DVD+R recording emulation, allowing blank virtual discs to be written with disc-burning software. Users can load and unload devices, check device status, and manage debug masks through command-line or GTK clients. The daemon exposes methods over D-BUS and can register on the session or system bus. System-bus use needs special permissions; session-bus use requires read and write access to the VHBA control device. CDEmu is free under the GNU GPL version 2 or later. The project lists official source tarballs and Linux distribution packages; third-party packages are not verified or formally supported.