The trouble with jackplayer, is that there is no sound at all.
If you just get piles of xruns after startup, it might be an issue w. 32bit jack clients in 64 bit jack servers. This used to work, and is still supposed to work, but i have had troubles ever since Fedora 22 with this.
By the way i probed for jackplayer (is it a binary ?) well there’s no jackplayer binary on Debian.
There’s no jackplayer binary. OM uses its own built-in, jack client, using a ffi to (32-bit) libjack.so.
If there’s no cure for the 32bit-client/64bit-server headache, an alternative coulc be to set up a script compiling a binary (installation-time) to use for playback.