Arcem
From Organic Design wiki
Converted the rpm to a deb with alien and installed with dpkg no problem. Created the ~/.arcemrc and concatenated the four rom files for RISCOS-3.11, but then having an audio problem.
$ arcem
Could not open Extension Rom directory 'extnrom': No such file or directory
extnrom_size = 0, extnrom_entry_count= 0
SetUpCMOS: Could not open (hexcmos) CMOS settings file, resetting to internal defaults.
HDC: Couldn't open image for drive 0
HDC: Couldn't open image for drive 1
HDC: Couldn't open image for drive 2
HDC: Couldn't open image for drive 3
X visual: TrueColor 24bpp found, RGB shift/masks = 16/8, 8/8, 0/8
couldn't open disc image FloppyImage0 on drive 0
inserting floppy image FloppyImage0 into drive 0: couldn't open disc image
couldn't open disc image FloppyImage1 on drive 1
inserting floppy image FloppyImage1 into drive 1: couldn't open disc image
couldn't open disc image FloppyImage2 on drive 2
inserting floppy image FloppyImage2 into drive 2: couldn't open disc image
couldn't open disc image FloppyImage3 on drive 3
inserting floppy image FloppyImage3 into drive 3: couldn't open disc image
Could not open audio device /dev/dsp
Could not initialise sound output - exiting
apt-get install osspd-alsa got the /dev/dsp device back but then... Could not read sample rate.