Troubleshooting - Yamaha MU90R Owner's Manual

Troubleshooting

Even though the MU90R is exceptionally easy to use, it may occasionally
not function as you expect it to. If that happens, check the possible prob-
lems and solutions below before assuming that the instrument is faulty.
If you are using an AC adaptor, check that the adaptor is properly plugged into both
the AC outlet and the MU90R (See page 14.)
Check that:
The panel volume control is set to an appropriate level.
Other volume-related parameters are set to appropriate levels. (See Volume and
Expression in the Single Part controls, page 43, and Master Volume and Master
Attenuator in the All Part controls, page 47.)
Mute or Solo are not active. (See page 25.) If a Part is being muted, or an empty
Part is being soloed, you may not get any sound.
The Variation effect settings are appropriate. No sound will be output at all if Vari-
ation Connection is set to INS (page 106), Variation Send is turned on for the Part
(page 44), and NO EFFECT is selected for the Variation Type (page 105). The
easiest solution in such a case is to turn off Variation Send for the Part.
The EG Attack Time (page 53) is appropriately short, for short percussive
sounds.
The Velocity Sensitivity Offset (page 67) is appropriate.
The Note Limit Low and Note Limit High (pages 65 — 66) settings are appro-
priate. If the former is set higher than the latter, no sound will be output.
The Velocity Limit Low and Velocity Limit High (page 68) settings are appropri-
ate. If the former is set too high and the latter too low, no sound may be output.
Check all MIDI connections, making sure that the MIDI OUT of the external device
is connected to the MIDI IN of the MU90R, and that the MIDI IN of the external
device is connected to the MIDI OUT of the MU90R. (See pages 31 — 32.) Or, if you
are using the TO HOST terminal with a computer, make sure that the terminal is prop-
erly connected to the computer and that the HOST SELECT switch is properly set for
your particular computer. (See pages 29 — 31.) Also, make sure that you have turned
on the connected MIDI instrument or computer before turning on the MU90R. If you
haven't, simply turning the MU90R off and back on again may solve the problem.
The maximum polyphony of the MU90R may be exceeded. The MU90R can play
no more than 64 notes at once. (Though 64 notes may seem to be more than
enough, you may run short when playing a connected keyboard along with some
densely arranged song data.)
Check all Reverb-, Chorus- and Variation-related controls: Reverb Send, Chorus Send
and Variation Send in Single Part controls (page 44); Reverb Return, Chorus Return
and Variation Return (when Variation Connection is set to SYS) in All Part controls
(pages 47 — 48). Also check the individual effect settings; if no Type has been se-
lected, or if the parameter settings are too low, there may be no effect sound.
Make sure that the appropriate A/D Part (A1 or A2) has been turned on and that the
A/D INPUT control is set to an appropriate level. Also for best results, make sure
that the A/D input type (Mic, Guitar, Keyboard, Audio) is set to match the input
you are using.
APPENDIX
147