just in case someone need CDEmu software that is in deb-multimedia, one of its packages has a systemd dependency, cdemu-daemon.

I  manually edited this package to be Devuan compatible

To install CDEmu in DAEDALUS:

- setup deb-multimedia repository
create /etc/apt/sources.list.d/multimedia.list

# Multimedia
deb http://www.deb-multimedia.org bookworm main non-free

create /etc/apt/preferences.d/50multimedia to lower priority.

Package: *
Pin: release o=Unofficial Multimedia Packages
Pin-Priority: 100

- Update and keyring

sudo apt update -o Acquire::AllowInsecureRepositories=true
sudo apt install deb-multimedia-keyring
sudo apt update

- Download and install the modified cdemu-daemon_3.2.6-dmo1_amd64_NO_SYSTEMD.deb

sudo apt install '<Path to>/cdemu-daemon_3.2.6-dmo1_amd64_NO_SYSTEMD.deb'

- Then you can install remaining packages from deb-multimedia:

sudo apt install gcdemu cdemu-client [image-analyzer]

- Remove or pin the deb-multimedia repository.

This is not ideal because I will have to do that for each new version, but this software saves my life for protected old games CD.