Dave Smith Instruments TETRA - Manual (Page 51)

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Support
Troubleshooting
Here are a few suggestions for resolving problems that may occur.
The sequencer has stopped running.
Make sure Clock in the Global menu is set to Internal.
Some of the programs sound different.
Check the Mod Wheel position. The Mod Wheel can do a lot more than just add
vibrato. Also, some of the programs use the sequencer to shape the sound so
make sure Clock in the Global menu is set to Internal.
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 Tetra. Or use MIDI, which is opto-isolated.
Tetra 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 Tetra’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 Tetra is being overrun with duplicate messages.
An oscillator or the filter sounds strange or out of tune.
Hold down A
SSIGN
P
ARAMS
and press the mode switch to run the calibration
routine.
Note: It is not necessary to run the calibration routine on a regular basis.
You should only run it if you are experiencing problems.
Still experiencing a problem with Tetra? Reset the Global parameters (in the
Global menu).
Contacting Technical Support
If you are still having a problem with Tetra, contact Technical Support at
[email protected]. Please include your Tetra’s serial number,
the version of the operating systems (Main and Voice displayed on startup), and
the purchase date.
Note: If you have not already reset the Global parameters and run the
calibration routine (see Troubleshooting above), you should do it before