How old are those Onkyo and Pioneer AV receivers? They did not support VBR (v0) MP3 until surprisingly late, and then couldn't show correct time remaining on those tracks right up until they went bankrupt this year and were sold off to VOXX and Sharp. Try a CBR MP3 on the stick
Also, a surprising number of motherboards cannot boot from larger than 32GB sticks, and a receiver may have a similarly abbreviated size limitation (a shame since 64GB is almost the same price nowadays, and odd too because that's also the SDHC/SDXC cutoff)
Oh well, there were similar odd size limits with IDE disks at 504MB, 2015MB, 7560MB, 128GB caused by simply not looking far enough ahead