Appendix B: Troubleshooting And Support; Troubleshooting - Dave Smith Instruments Sequential Prophet-6 Operation Manual

Appendix B: Troubleshooting
and Support

Troubleshooting

If you're experiencing problems or unexpected behavior from your
Prophet-6, here are a few typical scenarios and their solutions:
The sequencer or arpeggiator has stopped running.
Check the MIDI Clock setting in the Globals to ensure the Prophet-6 is
set to or, if set to or , make sure the Prophet-6 is receiv-
out in slave thru
ing MIDI clock.
Some of the programs sound different than usual.
Check the Mod Wheel position. The Mod Wheel can do more than just
add vibrato. Also, check the Clock settings in the Global menu to ensure
the Prophet-6 is set to or, if set to or , make sure the
out in slave thru
Prophet-6 is receiving MIDI clock.
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-6. Or use MIDI, which is opto-isolated.
The Prophet-6 is behaving erratically.
This is almost always caused by a MIDI data loop. Make sure that any
MIDI Thru functionality is turned off on the MIDI interface/hardware or
in the MIDI software application. Disconnect all the Prophet-6's MIDI
connections—MIDI and USB cables—and see if the problem persists.
You can also monitor the MIDI traffic with MIDI Monitor (Mac OS)
or MIDI-OX (Windows) to see if the Prophet-6 is being overrun with
duplicate messages.
The Prophet-6 doesn't seem to respond to its controls.
Make sure Local Control is on in the Global settings.
MIDI System Exclusive data is not transmitted/received.
Make sure that the MIDI SysEx setting in the Global settings is set to
usb
or depending on which you are using to transmit or receive MIDI
midi
messages.
Prophet-6 Operation Manual

Appendix B: Troubleshooting and Support

63