Hi Thomas, thank you for your patience.
1) Select your Track containing the special sync sample. Lay down a trigger on Step 1
2) On the SP-16 touch screen, enter the TRACK MENU by touching the Track you are sequencing.
3) The wide button at the bottom of the menu is called SEQUENCE. Touch that. Now you can edit your sequence in more detail.
4) While holding down Step 1 of your 16 step buttons, dial in the following settings using the knobs:
Retrigger Count: 24
Retrigger Spd: 1/16T
This creates one bar of 24th notes.
Hope that helps!