Roland AT800 Music Atelier Owner's Manual page 267

Problem
Noise is heard in the sound
Pitch is off
Pressing the expression pedal
while playing back ATELIER
performance data produces a
crackling noise
Rotary effect is not be applied
Some keys (of certain keyboard
parts) sound strange
Sound is distorted/cracked
Sound is produced when you take
your finger off a key
The Bass Range Sounds Odd, or
There Is a Vibrating Resonance
Check
If there is a cell phone nearby, you
may hear noise from the ATELIER when
an incoming call or outgoing call
occurs, or during a conversation.
Transpose is in effect.
The tuning is incorrect.
While set for an octave shift, you are
playing keys beyond the
recommended range. This does not
indicate a malfunction.
The expression pedal function is set to
"PEDAL+COMPOSER" during
playback of ATELIER performance
data.
When this setting is used, moving the
expression pedal while playing back
ATELIER performance data may create
a difference between the expression
pedal information in the performance
data and the volume as set with the
expression pedal, which can result in
this kind of sound being produced.
Some sounds do not allow the rotary
effect to be applied.
You are playing notes outside the
recommended range of the voice.
The Part Balance volume of each part
is too high.
The Reverb volume has been raised
when the volume of each Part Balance
button is already raised.
The [Master Volume] slider has been
used to raise the overall volume
excessively.
You have selected a "Marimba Treml"
or "Banjo Treml" sound.
When listening through speakers:
Playing at loud volumes may cause
instruments near the ATELIER to
resonate. Resonance can also occur
with fluorescent light tubes, glass
doors, and other objects. In particular,
this problem occurs more easily when
the bass component is increased, and
when the sound is played at higher
volumes.
When listening through headphones:
Here, a different cause (such as
resonance produced by the ATELIER)
would be suspect.
Solution
Keep the phone as far away as possible,
or turn off its power.
Simultaneously press the Transpose [-] [+]
buttons to cancel the transposition (the
Transpose [-][+] buttons' indicators will
go out).
Adjust the standard pitch.
Adjust the Octave Shift setting.
Set the expression pedal function to
"PEDAL" during playback.
This is not a malfunction.
This is not a malfunction.
Press the Part Balance button to lower the
volume.
Either lower the Reverb volume, or adjust
the Part Balance of each part.
Use the [Master Volume] slider to lower
the overall volume.
This is not a malfunction.
If you select a "Marimba Treml" or
"Banjo Treml" sound, a sound will also be
produced when you take your finger off
the key.
Use the following measures to suppress
such resonance.
•Place speakers so they are 10-15 cm
from walls and other surfaces.
•Reduce the volume.
•Move the speakers away from any
resonating objects.
Consult your Roland dealer or nearest
Roland Service Center.
Troubleshooting
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