JUPITER-Xm: Can I prevent the sound and tempo from changing even when the I-Arpeggio [TYPE] knob or [RHYTHM] are turned?

Yes. Use the following the procedure:

1. Press the [MENU] button.
2. Use the [1] knob or [Λ] / [V] buttons to select “SYSTEM”, then press the [ENTER] button.
3. Use [1] knob to select "ARP/TEMPO", then press the [ENTER] button. 
4. Use [1] knob to select the following ARPEGGIO parameters, and use [2] knob to turn each “OFF.”
   • Set Tone
   • Set Drumkit
   • Set Tempo
5. To save the changes, press the [WRITE] button.
6. When the screen asks, “SYSTEM WRITE Are you sure?” press the [ENTER] button. The screen indicates “Now writing...,” and you return to the SYSTEM setting screen.