This is the way you activate the vocalist
1 activation : F0 26 7B 36 00 7F F7
2 assign to Ch 15: F0 26 7B 33 00 0E 01 F7
3 select vocalist set 14
(MIDITRACK): F7 F0 26 7B 37 00 0D F7
have fun

if you wish another chanel
just change the
F0 26 7B 33 00 00 01 F7 (track 1)
F0 26 7B 33 00 01 01 F7 (track 2)
.....
...
F0 26 7B 33 00 0F 01 F7 (track 16)