Appendix D: Troubleshooting And Support; Troubleshooting - Sequential Prophet Rev 2 User Manual

Appendix D: Troubleshooting
and Support

Troubleshooting

If you're experiencing problems or unexpected behavior from your
Prophet Rev2, here are a few typical scenarios and their solutions:
If the Prophet Rev2 isn't producing sound:
1. Initialize a basic preset by holding the Transpose
and pressing the button.
hold
2. If the problem is still there, check the following:
• Master Volume - make sure it is set to an appropriate value
• Rear-panel output jacks - make your audio cables are connected to
.
output
• In the menu, make sure that
global
If the sequencer or arpeggiator has stopped running:
• Check the
midi clock mode
Rev2 is set to or
master off
/ , make sure the Prophet Rev2 is receiving MIDI clock.
no s s
If some of the programs sound different than usual:
• In the Global menu, check
alt tunings
t . Also, check the mod wheel position. The mod wheel can
emperament
do more than just add vibrato. Also, check the
in the menu to ensure the Prophet Rev2 is set to
global
Or if set to or
slave slave thru
Rev2 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 Rev2. Or use MIDI, which is opto-
isolated.
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Appendix D: Troubleshooting and Support

.
and buttons
down up
main
is set to .
local control on
setting in to ensure the Prophet
global
. Or if set to or or
slave slave thru slave
and make sure it's set to e
setting
midi clock mode
or
master
or / , make sure the Prophet
slave no s s
Sequential
If the Prophet Rev2 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 Rev2'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 Rev2 is being
overrun with duplicate messages.
If the Prophet Rev2 doesn't seem to respond to its controls:
• Make sure
If MIDI System Exclusive data is not transmitted/received:
• Make sure that the
to
usb
MIDI messages.
/
a
If the Prophet Rev2 plays out of tune:
• Check the
menu. If they seem correct, you may need to retune the oscillators. See
"Calibrating the Oscillators and Filters" on page 69.
If the pitch or mod wheel doesn't go to full range:
• Recalibrate the pitch and mod wheels. See "Calibrating the Pitch and
Mod Wheels" on page 69.
qual
If the filter sounds strange or out of tune:
• You may need to retune the filters. See "Calibrating the Oscillators and
.
Filters" on page 69.
off
Prophet Rev2 User's Guide
is in the
local control on global
setting in the
midi sysex cable
or depending on which you are using to transmit or receive
midi
and parameter in the
master coarse master fine
Appendix D: Troubleshooting and Support
menu.
menu is set
global
global
79