Zoom A2.1U - Manual (Page 38)

Troubleshooting
ZOOM A2.1u 38
GLOBAL
GLOBAL module
Serves for making settings to match the guitar amplifier and pickup in use and to
control the feedback control function. The settings of this module apply to all
patches.
GL GLOBAL
PICK UP
SELECT
See Table 5
FEEDBACK
FREQ
oF, At,1 – 30 AMP SELECT See table 6
Modifies the sound quality depending on
the guitar or pickup that is used, to fully
bring out the simulation capabilities of
the MODEL module (see table 5).
Reduces acoustic feedback by
attenuating the frequency band where
the feedback occurs. The frequency can
be detected automatically or manually.
For details on how to use the
FEEDBACK CONTROL function, see
page 20. This parameter serves for attenuating
frequency band that can sound harsh
when an acoustic guitar is reproduced
via a guitar amplifier (see table 6).
Choose the suitable setting depending
on the amplifier that is used, and adjust
the value as required.
[Table 5] [Table 6]
Setting Content Setting Content
oF OFF oF Sets the AMP SELECT parameter to OFF.
bP
Designed for use with a piezo pickup
having a bright sound.
b1 – b9
Designed for use with combo type amplifiers having a
bright sound. Higher values result in stronger
attenuation effect.
dP
Designed for use with a piezo pickup
having a dark sound.
C1 – C9
Designed for use with regular combo type amplifiers.
Higher values result in stronger attenuation effect.
bM
Designed for use with a magnetic pickup
having a bright sound.
S1 – S9
Designed for use with stack type amplifiers. Higher
values result in stronger attenuation effect.
dM
Designed for use with a magnetic pickup
having a dark sound.
SE
Designed for use with an electric guitar
and single-coil pickup(s).
HE
Designed for use with an electric guitar
and humbucker pickup(s).
GL
● Volume is low
Adjust the patch level ( → p. 9) or master level
( → p. 37). When using a pickup with low
output, start the A2.1u in HI-GAIN mode ( → p.
28). Try ajusting the expression pedal.
● Matching problem with particular
pickup or guitar amplifier
C h e c k t h e P I C K U P S E L E C T a n d A M P
SELECT settings.
● Delay/reverb effect does not work
DELAY/REVERB module is inactive while a
rhythm pattern is playing. Stop rhythm
playback (
→ p. 12).
● No effect processing (when using
[BALANCED OUT] connector)
Check whether the [PRE/POST] switch is set to
"POST" (effect processing enabled).
● High level of noise
Adjust ZNR module. Be sure to use only a
ZOOM AC adapter (ZOOM AD-0006).
● Hum is heard (when using [BALANCED
OUT] connector)
A ground loop has occurred among connected
devices. Try setting the [GROUND] switch to
"LIFT". This may help to eliminate or reduce
the noise.
● Battery life is short
A r e m a n g a n e s e b a t t e r i e s b e i n g u s e d ?
Continuous operation time is 6 hours with
alkaline batteries. The use of alkaline batteries
is recommended.
Troubleshooting
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