User manual

Table Of Contents
57
Prophet-10 User’s Guide
Appendix A: Troubleshooting and Support
Appendix A: Troubleshooting
and Support
Troubleshooting
If you’re experiencing problems or unexpected behavior from your
Prophet-10, here are a few typical scenarios and their solutions:
If the Prophet-10 isn’t producing sound:.
1. Recall the basic preset by holding down record and pressing preset.
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 audio out.
In the globals section, make sure that local ctrl is set to on.
If some of the programs sound different than usual:
In the globals section, check scale/alt tuning and make sure it’s set to
NOL. Also, check the Mod wheel position. The Mod wheel can do more
than just add vibrato and maybe be affecting lter cutoff.
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 (if connected) and the Prophet-10. Or use MIDI,
which is opto-isolated.
If the Prophet-10 is behaving erratically:
This is almost always caused by a MIDI feedback loop. Make sure that
any MIDI Thru functionality is turned off on the MIDI interface/hard-
ware or in the MIDI software application. Disconnect all Prophet-10
MIDI connections (MIDI and USB cables) and see if the problem
persists. You can also monitor the MIDI trafc with MIDI Monitor
(Mac OS) or MIDI-OX (Windows) to see if the Prophet-10 is being
overrun with duplicate messages.