User Manual

136 Appendix E: Support Dave Smith Instruments
Appendix E: Support
Troubleshooting
Here are a few suggestions for resolving problems that may occur.
The sequencer or arpeggiator has stopped running.
Check the Clock settings in the Global menu to ensure the Pro 2 is set to
Master or, if set to Slave, make sure the Pro 2 is receiving MIDI clock.
Some of the programs sound different than before.
Check the Mod Wheel position. The Mod Wheel can do a lot more than
just add vibrato. Also, check the Clock settings in the Global menu to
ensure the Pro 2 is set to Master or, if set to Slave, make sure the Pro 2 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 Pro 2. Or use MIDI, which is opto-isolated.
The Pro 2 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 (sequencer or whatever). Disconnect
all the Pro 2’s 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 Pro 2 is being
overrun with duplicate messages.
The Pro 2 doesn’t seem to respond to its controls.
Make sure Show is not on. If the synth seems to be responding normally,
but doesn’t make sound, make sure Local Control is on in the Global
menu.
MIDI System Exclusive data is not be transmitted/received.
Check the SysEx settings in the Global menu.