I couldn't describe the situation properly.
Was it Rockbox? Time just flies..I had a clip plus, what a wonderful small audio player. Did SanDisk kill the Sansa players?
indeed it was the rockbox running on the sansa clip zip and the small beutiful OLED screen in those days.
the later gen sansa were not as good and neither did rockbox support them. the clip , clip+ and clip zip and sansa clip video 2 inch screen were the last good ones of the lot before they were no longer VFM and ultra portable.
i even bought a few refurb ones to replace battery in mine so i could juice it out an year or more and then life and responsibilities took over lol.
but the Odac is and will continue to serve me. nifty little VFM dac as "DAC" was the buzz word back in 2012-13.