User Manual

136 Appendix D: Troubleshooting and Support Dave Smith Instruments
Appendix D: Troubleshooting
and Support
Troubleshooting
If you’re experiencing problems or unexpected behavior from your
Prophet X, here are a few typical scenarios and their solutions:
If the Prophet X isn’t producing sound:.
1. Recall the Basic Program by holding the Transpose down button and
pressing the hold button.
2. If the problem is still there, check the following:
• Volume - make sure it is set to an appropriate value
• Rear-panel output jacks - make your audio cables are connected to
main/a
output.
• In the
global menu, make sure that local control is set to on.
If the sequencer or arpeggiator has stopped running:
• Check the midi clock mode setting in global to ensure the Prophet X
is set to master or off. Or if set to slave or slave thru or slave no s/s,
make sure the Prophet X is receiving MIDI clock.
If some of the programs sound different than usual:
• In the Global menu, check alt tunings and make sure it’s set to equal
temperament. Also, check the mod wheel position. The mod wheel can
do more than just add vibrato. Also, check the midi clock mode setting
in the global menu to ensure the Prophet X is set to master or off. Or
if set to slave or slave thru or slave no s/s, make sure the Prophet X is
receiving MIDI clock.
If there is a ground hum in the audio output:
• USB can cause ground loops, so try to resolve any grounding issues
between the computer and the Prophet X. Or use MIDI, which is opto-
isolated.