Music status not showing on Conky/MOC?

I am installing Graffias theme on Conky but the music not showing what is played on Rhytmbox. I am also looking for a way that those display anything that play on Firefox/Discord etc just for the aesthetic. Trying to configure using ConkyManager2 but there is no option for music.

-- UPDATE: after looking on config file, there is this code:

${offset 0}${voffset 40}${font Material:size=9}${if_running mocp} ${font Carlito:size=11}${moc_state} :${else}${font Material:size=9} ${font Carlito:size=11}No music played${endif}
${offset 0}${voffset 5}${font Metropolis black:size=15}${if_running mocp}${moc_artist}${else}${font}
${offset 0}${voffset 2}${font Carlito:size=11}${if_running mocp}${moc_song}${else}

Basically I need to add code containing Rhythmbox/Firefox/Discord process. The problem is I don't know how to view those process, I take a look at System Monitor but it doesn't show much information to replace ${if_running mocp} ${moc_state} ${moc_song} ${moc_artist}

I try to change 'mocp' with rhythmbox but it's not working as if it doesn't understand what rhythmbox is. My suspect is that the script can only read a cmd processes?

Any idea? Thanks in advance!

If you look at the .conf file you will see that the music playing part is referencing mpd (Music Player Daemon). I don't know anything about this myself, it may be as simple as installing mpd or may require more conky related tools/setup, but maybe start here: https://help.ubuntu.com/community/MPD